That's what I've thought when I read that. I guess some take the genius artist as some kind of guru
As to the possibility if people may change, I think they may. Not all will change, but we know from research that the frontal parts of the brain are late to develop, full maturation may take until the age of 25 (there are, however, huge individual differences and some indication of gender differences). Those frontal parts are exactly the parts used for (long-term) planning, are implicated to have a roll in ethical considerations and evaluating possible future consequences. Thus, at young age, people might not make the same decisions as later on, when they contemplate things differently.
This is what plays a role in the lack of future consideration of adolescents and the inability to see possible negative consequences of behavior in childhood.
I think most parents will recognize this situation: Your child is running around wildly through a room and you're warning them over and over again to stop running as some vase may fall down because of their running. As they ignore you, they indeed knock down the vase and you get mad at them. Then they say: I didn't do it on purpose! Really! I didn't. And they seem genuinely surprised by the fact they knocked down the vase. And you know what, they may really be. They do not fully recognize the possible danger, are neurally unable to do that fully. (Of course you can learn children the fact that running around in a room with vases may cause problems, but that's learning an instance, a rule, not learning the ability or tendency to contemplate over future consequences of action.)
The same holds for adolescents/young adults in sports. They may do something stupid, because they're young (their brain didn't mature fully). And they may never do that again when they're older or learned the consequences the hard way. As cyclists become under pressure when, on average, their brain isn't fully matured, we should have a professional support system to guide them and help them make good decisions. (For some people this maturing can last until around age 28, that also holds for cyclists).
(I am not saying they shouldn't be responsible for the choices they made, I am just saying that when they are older, they may make different choices. Something that some people will call a personality change (which I don't think it is).)