I read 'Profile of a Prodigy' about Fischer many years ago...fischer grew up in a one-parent family that struggled to make ends meet. By the time Fischer was 11 his elo was around 2100. By 13 his rating was at least 2300. At 14 U.S Champion & a strong GM just after turning 15. Paid lessons...no way...mother was too poor bringing up two kids in heartless america. Compare this feat with Judit Polgar [lovely, highly intelligent woman] who was raised by a psychologist father to become as good as his study plan would allow. She's now about 2700.
Fischer's 'coach'? Who? There was a guy called John Collins who might have helped a bit, but Fischer did it alone - he was a loner and wouldn't accept help from others according to what I have read.
I can guarantee that even a very bright person with the desire to become a GM will fail 99% of the time. It is just very very difficult & requires a freakish set of abilities + the desire to work hard & very often.
Isn't it said that Fischer had the best hardware, but Kasparov had the best software (i.e. preparation and study habits)?
also, on a side note, my great uncle played against Fischer and gave him the worst advice he ever gave anyone. Fischer was 12 or 13 at the time, and my uncle was in his early 20s in the NYC chess clubs. What he said was, "you're obviously a really bright guy, so don't devote your life to chess. It's an impossible career, and you can make greater contributions elsewhere"
lol at my uncle (he's the first to admit that that was the worst advice he ever gave anyone)
certainly i am glad that bobby didn't take that advice, but it would have been interesting to see what other ways he might have contributed to the world, for bobby's own personal life though i am sure he possibly sometimes wished he had taken it rather than ending up running from the government for around 40 years and ending up being thrown in prison around age 80 all because of his chess career.