To compete at that level you need it allSure they are. But in your video, right after the steroid conversation, he explains how it's not all about steroids. My opinion is, they give you an extra edge. It's a part of it if you want to be a champion bodybuilder.
You still have to build the foundation via the training and diet. For most of us, we don't need steroids.
Training
Diet
Steroids, growth hormone, insulin etc - walking chemist basically.
Genetics
You don't end on stage in most comps with those physiques by accident.