the reason they dont work for bodybuilding is because they incorporate too many muscles ! like you said, you dont even train biceps because cleans hit them. do you honestly think your biceps are growing better off of indirect work from cleans, than they would if you gave them their own full workout with direct exercises ?
heck no they arent !
but if you DO do direct exercises for a muscle, you cannot just go and hit it indirectly two days later and expect to work out that same muscle directly again the next time it pops up in your schedule.
what do cleans hit, pretty much everything ! but i could see them , being done properly, hitting almost entirely upper body. so i guess, if your a bodybuilder training something like
upper
lower
off
upper
lower
offf
ect ect
then cleans would work just fine, fantastically even.... since heavy compound movements are great for hormonal stimulation and metabolic rate.