You are literally talking out of your ass:
https://www.oddsshark.com/ufc/georges-st-pierre-vs-conor-mcgregor-betting-odds
Bodog -150 GSP +120 McGregor, GSP slight favorite. Most would assume he would win? Did you fail grade school math?
Now compare those odds the rest of his career:
https://www.oddsshark.com/ufc/georges-st-pierre-career-ufc-odds-history
If you had half a brain, you'd realize he's been a significantly larger favorite during most of his WW reign. The one fight that would have put him as a significant underdog was the A. Silva fight, during both of their primes, a fight which would have done more things for his legacy than any of his WW bouts, but he ducked that fight his entire reign. The fight with Conor would be far more legacy building based on this alone, not to mention the incomparable amount of money and fanfair that comes with it.
You are indeed too stupid and colored to argue with, literally delusional to the point of hilarity.