There is a recent thread where most posters agree that T is the Worst thing that had Ever Happened to them in their entire Life. Most risks are about trivial things (e.g., lose some money, get punched in the face, etc). I think that T can be worse than Death (in other words at some volume/pitch level, death becomes clearly a preferable option).
Also, since those horror stories appear on a weekly (and often daily) basis, my guess is that the risk is something like 1-5% (and probably a lot higher in the long run for people who keep taking the risk). Another thing to keep in mind is that we might be talking about hearing silence again vs. having T stay at the present level. It is possible that a larger fraction of people who protect their ears end up hearing silence again, compared to the fraction of brave people who get to hear silence again.
In any case, I doubt that many people would take a risk of being burned alive for a prolonged period of time if the probability of that happening were to be 1-5%. This is what T is to me - being slowly burned alive for the rest of one's life. And this is why I think that it makes sense to not take any chances when it comes to something important (life-changing) like T.