Lest someone believe this is a belief held only in rural areas, let it be clear that ideas like this are incredibly common in not-so-rural places like in the US. It's usually accompanied by some equally ridiculous beliefs about what virginity is in the first place (protip: it's about having sex for the first time, not about whether the woman bleeds or how "tight" anything is), hard to find comprehensive and unbiased education, the total lack of knowledge of or misinformation concerning alternatives to pads and tampons (reusables, cups), and straight up shaming and misinformation about birth control usage. The big difference between the poorer and the richer is that honor killings, genital mutilation, and whatnot are far less common for the latter.
I love what this guy did for his wife and other women in the same situation, but there's no shortage of similar problems for women elsewhere and I wonder if there will be something revolutionary on that front too any time soon. I've been considering going to med school and see if I can eventually merge my interest in that and tech at the same time to do something here but that's a long term iffy goal, and surely there are already others interested in the same thing too.
I'm pretty lucky to have had reasonable and educated parents that were willing to tell me (or let me discover) all I wanted to know about these things when I was 10. But it feels like at least once a week if not daily I discover a teen or a preteen or even an adult woman asking basic questions on one of the women-focused communities I spend my time in. I wish I could help them. :(