I don't want to sound overly cynical but I don't think that's the case here with Dim. I wish him the best as I wouldn't want a thing like this to happen even to my worse enemy. But this sounds like a marketing ploy. After his first aorta burst, he went back on the juice and competed again. He brought this upon himself like it or not the same way an alcoholic can't really blame bad luck when diagnosed with liver cancer or a smoker when his lungs give up. Now, what is exactly his future going to be? PT? So I guess trying his hand at motivational speaking might be his only option.
I think a speaking career is a possible option, but when people go through such a massive loss like he has, especially when his physicality was everything to him, their is a long stage of emotions one has to go through to get to a point of acceptance, and I don't think he is their yet. During his video spiel you can see the angst in his facial expressions, his optimism speech didn't seem genuine, it is too soon to be spruiking the positive role model agenda. In terms of the theory of change, he hasn't yet made the stage of maintenance that is vital to sell whatever theory you have to success.
By trying to skip the essential stages to recovery he is likely to relapse into a huge state of depression and despair. Nobody loses the loss of their legs and is upbeat soon after, it's called PTSD, and I hate to say it, but if he doesn't deal with the reality that he is unlikely to walk again, he is going to emotionally crash hard. I HOPE I'M WRONG !!!