To hear Luke, at times, you would think that he was a model of health, came to BYU, and the system/program destroyed his body. But it appears to me that Luke had nearly chronic problems before he got to BYU, and his career and injury at BYU was - at worst - merely a continuation of an unfortunate history of knee and joint problems. Luke's story is a tragedy/irony that approaches Greek Mythology-levels. He was given a superb talent, but a fragile body.
Point being, I think a lot of elite athletes who don't make it as professionals in life are prone to see external reasons for their struggles, failures, and injuries. That's not a bad thing, and they aren't bad people or players for doing so. But I do think it is wise to take their advice with a grain of salt, particularly if they are suggesting that "if only 'x' had been different, I'd be a millionaire in the NFL."
Even Karl Malone sometimes has this tone. . .