It isn't going to hurt anyone. No reason to be insulting about it.
This is where she really jumped the shark with me. She knew good and well that making some ultrapure-sounding remark about kissing was going to insure that her remarks were repeated, and maybe given prominence (we're talking about her, here, aren't we?) and that's when it seemed extremely fake. No sensible person is offended by premarital kissing in Western society, even the most repressive religions do not mention it.
What concerns me is all the people she's going to reach with this book who have just broken up with someone, in a bid to punish themselves for the sexual aspect of the failed relationship, and not for making a bad pick.
Blah blah blah....
Really, again, SO WHAT?
Nothing such people do is HURTING ANYONE (unlike screwing someone which can affect their health mental or physical, as well as producing a child in bad circumstances), and it's not even hurting themselves. So who cares?
You're reading stuff into her writing that isn't there. The fact that you're quoting garbled fragments served up from a site that really hates her guts --- the Gawker ----and taking that as the unvarnished truth, shows that you're not trying to get a fair and careful take on the author in her own context and in her own words.
Your loss. Her own words are sensible, insightful, and worth an honest read.