let me see if I can explain how this can make sense
anyone can use drugs - takes no effort
everyone enjoys training - takes effort but people enjoy it
genetics are out of your control - cant do nothing about it either way so it doesnt matter
the only factor which is in your control and which takes self-control and discipline and isnt always enjoyable and convenient, is diet.
and among those with good genes who train hard and take drugs, the difference between the ones who look good and the ones who does, really comes down to whether they are staying lean - and since the other variables are already held equal, the one thing that matters most here is diet
also, getting huge does require that you eat a significant amount of protein regularly throughout the day. and not everyone has the disciple - or the money - to do that. it isnt very convenient.