For all the different philosophies about what Am divisions "should" be available and what Am payouts "should" be---
Most of those options are available. You can run a tournament with one Am division, or just Advanced and Intermediate. Or Advanced and Rec, so the intermediates play advanced. Or Open and Intermediate, so everyone over 935 plays Open. You can run an Am tournament trophy-only, with low entries or regular entries and big players packs. There are few absolute PDGA restrictions, other than where the ratings cutoffs between divisions are and how deep you pay out, if you're paying out. And if those restrictions don't fit your philosophy, you can run non-sanctioned events under any system you like.
The problem is that if your idea is that "Players should do, not what they want, but what I think is best for them", they may not show up.