Because about 90% of the fighters out there don't know squat about strength training, functional training or explosive training and conditioning.
Oh yeah, they got to be pro fighters by eating cupcakes and jogging 1 mile every 3 weeks...rampage is a VERY strong man, Very functional fighter and is ALWAYS in good condition. he was like this BEFORE he had REAL trainers, but i'm sure you knew that.
Come on dude, you can come up with better stuff than this.