We live in a world of forms though, so to interact in that world of forms we take forms, our actions take forms, and anything beyund the indefinable and unlimited Source energy will have qualities, which means it will have things that it IS, and things that it is NOT. 
So with respect, your argument that people are limited misses the mark for many of us, because in order to dance ballet, once does not learn how to operate a backhoe digger; this doesn’t mean ballet is limiting, it just means that it is a specific thing with qualities, “is” and “is not.”
That said, some of us are adept at walking both, this is the essence of “subjective synthesis” described by E.A., that one adopts the belief system necessary for the changes one wants to create - chosing the qualities to interact with the world of forms. Doing the ballet when in satin slippers, driving the backhoe when in rigger boots.
I posted some material about this on on here and like many here, I happily flip between nigh-on religious devotion to some beings, to absolutely seeing my individuated self as the Self. I posted about use of conventional demonic evocation in that process here.
Even the early demonic grimoires require the magician to assume some self-identity with God, and the PGM tend to walk to that point through taking god forms (is, is not) so what may appear limiting, changes when comprehended differently.
I’m curious, what was your first experience with (insert whatever term you use for making changes to reality in conformity with your Will)?
What got you onto this path? 