He makes some decent points, but I'd say more towards the painkillers than steroids.
A good percentage of these roided up guys come from a bodybuilding background and were using them before they entered the business. Triple H was a bodybuilder beforehand and I believe Masters was too.
As for the time the smaller guys got the push, Bret has admitted to steroid use and Shawn failed a test back in the day for roids (but denys ever using them).
The bumps are a major issue though.