I'll agree that there is more than one way to skin a cat, but I disagree that the principles make no difference for naturals, or people on steroids for that matter.
I find that for me personally, If I don't do a thorough deliberate scaling-up type of warm up, I am just asking for injury of some kind. Maybe some people can get away with diving right in, but for me, longer warm ups were an important part of the learning curve.