You don't need to achieve enlightenment to be a Buddhist either, you can just say you are one, and maybe sit on the floor sometimes. However, there is not much point to calling yourself a thing if you don't attempt to achieve in it.
The whole reason for magick is to balance out the waring factions in ones inner world, in order to transcend the lower mind, and contact the higher mind. If one only seeks to act out ones obsessions, a better name for what one is would be a slave to ones passions, A neurotic, psychotic, Megalomaniac, addict, miser, sex fiend, war monger, etc depending on tho nature of the particular "spirit" that you feed and sacrifice your higher self to, that is whatever you make into your GOD.
Thelema is about making none of these into God, it is balancing these out to discover your inner purpose, and setting this as the authority over all the lower spirits.
or to put it in the terms of Trent Reznor "Bow down before the one you serve, your going to get what you deserve"
Or as RAW put it in Illuminatus! "we are a group who takes our motto what the fellow with horns said to the man in the clouds... Non Servium"