CATCH-22: “You can’t criticize X, because you’ve never experienced it!”

“You can’t criticize X because your experience makes you too emotional about it!”

Obviously, there are some cases where this is true (esp. #2), but under what circumstances are these types of argument really helpful, persuasive, rational, or compassionate? Too often they’re just ways to make your opponents feel like idiots. Just saw a particularly egregious example of #2 (not on a blog) which almost succeeded in getting a woman to shut up and accept that she has no right to an opinion on something she personally went through. Grrrr!