Why are diametrically big and volume heavy chests lost in modern bodybuilding?

[Bodybuilduser1]

I almost never see competitors have either one, and especially not both. Brock Lesnar has bigger pecs than just about anybody in there and he doesn't bodybuild a day in his life. A freak athlete, obviously, but still why don't we see anyone?

You're born with the diameter but the fullness part you can control.