Some who can't might have the attitude of why bother but again the connotations of it are different than someone who can and why bother. For example a marathon runner who doesn't run a marathon because of it is different to some couch potato not running it, and saying they aren't just because The reason behind why bother changes even if the result is neither of them going flawless. The rest of his comment makes it pretty clear he doesn't like pvp. And that changes the context. Tbh my comment wasn't that deep, just the difference between can't and won't is likely a destinction they chose to blur.