Want more proof???
Holly Holm.
Before her fight with Ronda Rousey.
1. UFC Fight Night (LOL!!), didn't even main event,
DIDN'T EVEN CO-MAIN EVENT, She was third on a UFC fight night card (F**KING LOL).
Earnings: $50,000
https://en.wikipedia.org/wiki/UFC_Fight_Night:_Mir_vs._Duffee
Not a PPV, so no buyrate. and only $412,000 at the gate .... LMAO.
2. UFC 193, PPV headliner v Ronda Rousey.
Buyrate: 1,100,000.
Earnings: $180,000
https://en.wikipedia.org/wiki/UFC_193
not to mention more fans:
3. UFC 196: After her popularity increase from fighting Ronda, her salary increased
A LOT.
https://en.wikipedia.org/wiki/UFC_196
Buyrate: 1,300,000 (ok McGregor was headlining)
Earnings: $500,000
(10 times!!, YES,
TEN TIMES higher than her purse from two fights ago ... hmmm, you don't suppose this has anything to do with her fighting Ronda Rousey, do you??)
Conclusion: the exposure and fans that McGregor and Rousey bring to the sport, makes other fighters richer.
Conclusion: you are wrong ... again, PERIOD.