I am aware of that. It's that exact system that I take issue with. It's one of those things where if its always been that way, then we should always do it that way. And of course it's sanctioned by the governing body so it will never change.
Return of value is mandated by rule, but the cost is dictated by TDs not rule. No reason whatsoever a B-tier has to cost $60-70+ for Ams just to return $60-70+ of value to them as required by rule. Charging $20-25 and giving $20-25+ value back to each player still fulfills the PDGA requirements without breaking the bank.
Also, those guidelines are in regard to net entry fees, not the gross. Charging $35 for an event and returning $20 of value to the player is fine for an B-tier if the other $15 is covering fees and expenses (player fees, course rentals/reservations, etc). However, the expectation of many players is that the TD/tournament has to give them tangible value for that other $15 as well. And when they don't get it, they get vocal. They're incorrect and ill-informed, but since when has that stopped anyone?