Yeah, it's weird to see so many women shaming this person for waiting until she was comfortable.
I wonder if it's a generational thing? Statistics show that Gen Z are having less sex. Being single is the norm, and many women are losing their virginity later in life - and not for religious reasons. The OP's wife, in her late twenties, would seem to fall into this bracket, with her experience being common but still too stigmatised to talk about.
It's interesting. Older generations were shamed for having casual sex, so many still view that as the ultimate act of feminist rebellion. A reclaiming of one's body. But for younger generations, casual sex has become the expectation - and in a porn-saturated culture, it looks very different to the casual sex their mothers might have had. More and more, it looks like the Gen Z reclamation of bodily autonomy is to restrict sexual access. Millennials have been pushing back for a while now too, with many Millennial women speaking up about how the "hook up culture" of their youth left them having sex they didn't really want to have, because they thought that was the empowered, modern woman thing to do. The Sex and the City effect.
Casual sex is never going to go away, but I think fewer women are actually comfortable with it than we assume. I get the sense a cultural shift is coming. Right now, the norm is to shame an older woman for her lack of experience, or to assume her choices are motivated by religion. But it looks like we're headed to a place where a significant proportion of 20s / 30s women will be virgins for other reasons. The way we talk about this will shift as that reality sets in. If 30% or more of women that age find themselves in that boat, and know most of their friends are too, they will stop feeling quietly ashamed about it, and start speaking up to defend their choices.
We saw the same thing as the birthrate started going down. Women got sick of being pitied and treated as less-than for being "childless", and began speaking up to defend their choice of being "childfree". About ten years ago, as this became reality for more and more women, the framing of the whole conversation started to shift. Among women ourselves, anyway. I think later virginity and rejection of casual sex will become one of the next big cultural conversations, along with solo parenting. (Women choosing to go it alone with a sperm donor.)