Yeah, it's been retconned somehow that Fischer was this non-booked up player and didn't like opening theory. Instead, it's his convenient excuse for not wanting to study anymore.

There was probably not a more booked-up player than Fischer in his prime, something he seemed to try to make people forget. Famously when asked about a young Soviet prodigy by the Soviets, Fischer responded that the kid was good, but that there was a better player in their women's division who had more signs of promise. Many of the Soviet masters had no idea who Bobby was talking about; but Bobby was reading all Soviet chess literature and magazines to stay up to date.

That said, FRC is pretty interesting.