Sure it is, it just takes considerable effort and discipline. Steroids are like a massive shortcut but by no means the only realistic path to getting huge.
It really depends on what you mean by huge. But I have to emphatically disagree with your statement. It is simply not humanly possible to get as big as a modern body builder without steroids.
They are not just a shortcut they allow people to get much bigger than otherwise is possible.
Yeah I suppose we have varying definitions of huge. I'm just talking adding on considerable muscle mass.
Steroid use is so ubiquitous and far better understood than ever before that most guys don't see a point in doing things natty. We're talking cutting down years of training to months.