Why do some women believe that us men will hate their postpartum body?

I'm curious. Okay, I personally don't find other women's postpartum bodies attractive, but that's other women. When it's my wife, she's the mother of my kids, it makes me more attracted to her, not less. Yet my wife watched a video of some purple haired idiot stating that i will find her less attractive after she gives birth. She suddenly was insecure, and when confronted, she admitted that the video suggested I would find her less attractive and that I'd cheat or leave. I asked her to show me the video in question. After watching I told her how full of shit the video was, and all one needs to do is read the comments, and sure enough, dozens of men were saying the same as I was, and dozens of women were saying that their husbands couldn't keep their hands off of them..

So why make shitty, plainly false videos like that suggesting that a woman's husband won't be attracted any more once she gives birth?

This video explains it as well

https://m.youtube.com/watch?v=c-7JphpviSM
Why do some women believe that us men will hate their postpartum body?
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