I just don't see how steroid helps you drain clutch putts and make impossible up and downs for pars, which is what he was doing to win those tournaments in bunches.
Dude was just a prodigy with an incredible work ethic and had very strong guidance from his father.
Not that the steroids helped him do those things you mentioned, but if he was using them (and I would not be surprised if he did) it would lead to his body breaking down the way it has.
FYI the reason why I say I wouldn't be surprised is because he obviously was into fitness (SEALS training) and was up there with Jordan in being competitive personality and self-improvement.....
I honestly think it's a combination of factors:
Body broke down for whatever reason(s)
Golf is mental and the scandal affected that
Not to sound like a grumpy old man but during his run of majors there weren't any other consistently great golfers. Duval was a flash in the pan; Sergio never did it; Phil was a headcase. The same time he started his decline the field started improving- thus making the relative fall even more so.
That's what I think often got overlooked in all the Jack vs. Tiger comparisons is that Jack also played against other all-time greats that won majors preventing him from winning even more. To go along with this compare top-3, top-5 and top-10 finishes in majors between Jack and Tiger and it tells a lot. Hell not only does Jack own the record with most Majors but also the most runner-up (19) which Tiger wasn't close to. Even in his prime if Tiger wasn't leading going into Sunday, he was usually a non-factor. And out of Jack's runner-up finishes take a look at who beat up in some of those and how they stand on the all-time greats list