Those guys have devoted significant parts of their lives to trying to save me and "society" from ourselves. We are not their children, nor are they our moral and intellectual superiors. This is a deeply obnoxious and condescending mission to which the normal, healthy reaction is "Leave me the f- alone and worry about your own life, jerk. If I want your advice, I will ask for it. Which means never."
I guess these guys are looking for meaning in life, in all the wrong places. Here's an example from the insufferable Cass Sunstein who wants to save me from Coca Cola and lots of other things too.
Pardon me, but I like Coke and I like guns. You do not. So it's your loss. CS Lewis said it best:
Of all tyrannies, a tyranny sincerely exercised for the good of its victims may be the most oppressive. It would be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated; but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience.