So he hurt his legs anyway. That's Tatsumi's fault alright. Also his coache's, but who knows what happened in England.
In summary, they failed hard about what they were trying to do ten years ago, even if it was for causes outside their control.
It is fine tatsumi doesn't regret any of that, but I think he could've saved his legs, to me it isn't justified by saying that he has to give his all because that's the way he is. It's like he values his ego more than his own body.