That is why we all need a system and means which truly allows for expression of potential,and not just revolving around the same issues (as the training-injury cycle you talk about) over and over. We may then want to start asking where true limitations arise first hand. I have only one answer: in the brain. Also the hamstring injury you talk about originated up there,and up there are the regulatory mechanisms which allowed for the scar tissue to form and stay there over time.
Also I recall a slide from Charlie’s Vancouver Seminar in which how training is meant to affect the complex ability to express potential more so than build on it. That alone should originate some thoughts and considerations.
Too many times on the other hand it seems to boil down to absurd weekly training set ups and should I do this or should I do that like master coach x who does this or champion athlete y who does that or former fat guy down the road who got his six packs with magic intermittent dietary regime type of discussion,while still and always groping in the dark principles wise.
But then we want to talk about genetic potential…maybe we should start getting our brains at least focused right.