Good points.
I read some study that said the "average" female porn actress is like 120 lbs and a 32 B or 32 C cup. Male actors are about 170 lbs on average.
Basically you get average sized (body/physique) dudes with above average size and girth
...pair them with petite women and every porn dude looks ridiculous.
The women that regular dudes smash have much bigger azz and natural titties than most porn chicks.
As long as a porn dude can perform on command in a room full of people, he can get away with being average if they pair him with small broads.
The big time famous brehs like Lex have the performance ability and rare size.