I'm not sure what your source is, but perhaps update the Chess960 Wikipedia page with this information because what you're saying here contradicts what's there.

I'm not sure what your source is, but perhaps update the Chess960 Wikipedia page with this information because what you're saying here contradicts what's there. Fischer was, despite being, at one point, the greatest chess player in the world, and on people's all-time greatest lists, predictable in his use of openings, as you know since this is widely documented and you're well-read on him. Your quote even admits this. So I'm not sure what you are exactly disagreeing with that I said. Maybe the source of disagreement is that I unintentionally gave the impression that he has a bad memory, or a bad opening game. As he was one of the greatest chess players, this was clearly not true. Rather, the idea was that he had a notable disdain and discouragement from memorizing learning opening game theory. He was never able to master a very large number of openings... This was a notable feature of him as a player. Perhaps he could have, but that would be speculation. I think he just wasn't as good at it as the other top players.