If you're doing pull-ups and heavy rows as well, why would you attribute the growth to the iso movements rather than the increased overload of the compounds?
k bro, here's the difference.
You are telling people to NOT do stuff. And we are telling people to, yes do them. There is a big difference between the 2.
Obviously, the greater part of stimulation for growth comes from heavy compound excercises. Anyone who knows a bit about lifting should know that.
You are telling people to ignore the smaller isolation excercises altogether, when that is not good advice. If they do the compound excercises and have thoe covered, the addition of isolation excerises can only be of more benefit.
And by you telling peolpe to not do them is not helping anyone. I understand your view point 100%. But, by telling someone to not do isolation excerises vs. saying "yeah, throw them in at the end after you got your core excercises finished" is simply giving people the wrong idea.
Isolation excercises target smaller muscles that get over looked and unrecruited when using heavy weight. Take rotator cuffs for example. If all you do is lift heavy bench and military without doing dumbbell raises, your rotator cuffs become almost completely neglected, and they reamin weak while your other bigger muscle get big and strong. Guess what happens? yep, you get injured.
Same goes for the smaller connective muscle and tissues in every joint in your body. knees, hips, ankles, elbows, wrists and shoulders. A small weak muscle will not attempt to aid in lifting 300 pounds. it lets the bigger ones take over. Ever do side dumbbell raises with 5 pounders for 20 controlled reps? It burns like hell, because your smaller muscles are getting to do the work while the delts are giving stabilization.
There was guy named djeclipse on here that shares your same ideas about iso excercises. We had several 10 page discussions on the issue. I know where you are coming from, but the idea of suggesting to neglect certain excercises, isos, has a serous flaw.