This is largely dependent on your goals with magic. If your engagement with magic is purely for practical reasons then things like chaos magic, folk magic, and traditional witchcraft are effective enough to cause change. Stuff like curses, money, career, love, the normal things we seek from practical magic. Before we go into why ceremonial we have to look at the modern theories of magic.
Psychological/Unconscious - This is power of belief, and works off the idea that the subconscious mind is so powerful that it can unconsciously program you and your immediate surroundings to drive you towards your goal. This is where Chaos Magic, Manifestation, NLP, and Law of Attraction lie. This is an entirely effective model but somebody working with this model will not experience the same supernatural and paranormal phenomenon that their contemporaries do. There is also little in the way of transformation as this model is dependent on the self and self-will and requires no externalization to operate.
Spirits - This an incredibly ancient model and is one of the primary features of what makes western magic, western magic. Western theology and philosophy points towards a necessity for daimones or spirits to move upon the material world to enact the Will of the gods as they are too simple and transcendent. The manipulation of these active mediators is the logic and reason behind the development of the Mesopotamian exorcism, Goety, Necromancy, and Angel magic. We can see this belief and idea in a lot of shamanistic and indigenous cultures too, though not with the extreme philosophical architectures of spirit hierarchies that were developed by the West to aid in the manipulation and understanding of the realms of the spirits. People who operate off this model usually experience a lot of paranormal phenomenon and will have experiences that confirm that there is something way more than the psychological model happening in magic.
Occult Virtues & Sympathies - This is where we get into the magical properties of materials; this is very common amongst folk magic and witchcraft. In my experience people who are good at this are capable of some of the craziest manifestations of magic you can witness. The practice of this at an adept level is usually reserved to closed practices and requires either a natural ability or acceptance by somebody skilled in this art. You won't be able to study your way into mastery of this skill but if you are lucky enough to witness it in its most dramatic form you will understand that there is something incredibly real to the occult virtues.
Energy - The West has some energy practices from Egypt but it was largely tossed out and forgotten in favor of the spirit and occult virtue models. This is a way more common model in the Eastern Practices though it was reintroduced to the western lexicon in the 19th and 20th centuries. This is where there is a belief in subtle energy bodies that can be manipulated and used to manipulate the world around you.
So then why Ceremonial Magic? Ceremonial magic at its core is a structured and developed vehicle utilizing Western symbols and mythology for the purposes of Self-Mastery and in turn, the ability to exact the Will onto the world around us. It doesn't really get codified into the form we are familiar with until French Occultism in the early 19th century which then went on to influence the Golden Dawn and Aleister Crowley. Before then what we consider "Ceremonial" was really just operative procedures for binding and commanding spirits. The philosophy of Ceremonial Magic is that by self mastery and personal transformation the Magus is granted authority and powers over the spirits. Within its 20th century expression energy practices like yoga/transcendental meditation/astral projection/light bodies begin getting incorporated as well. Though we can see within ancient grimoires, neoplatonism, and jewish mysticism these practices are heavily implied, and all these currents informed Ceremonial practice and structure. The Ceremonial Magician approaches magic with the understanding that their power comes from molding themselves into a demigod archetype, like Hermes Trismegistus. That their spiritual authority to command spirits at will are directly correlated to their personal development. This is what protects the ceremonial magician and is also a marker of their "wizard-dom". Ceremonial magic is the living embodiment of As Above So Below. The ritual itself is a construction of the cosmos as the magus understands it, their timing and procedures are them working copascetically with the spiritual realm, the ritual is a material construction that is a reflection of the unseen forces they are working with.
The reality of the situation when it comes to Magic is all models work and are true. Anybody can cum on a sigil and make a hundred dollars appear, but thats not really the goal of the ceremonial magician. Its like comparing a fitness coach to a physician. One seeks results the other seeks to diagnose and cause lasting change. The reason spirits are so heavily intertwined in Ceremonial Magic is because the spirit-model is how the West has understood the agents of magic for millennia.