If women need a financially stable man because she will spend too much money or can't go on travels and whatnot, or can't date an unconfident man because he'll ruin the relationship, why don't men have to care about these things as much?

Here's the issue: you don't have to cohabit yet. You can't have to travel yet. Maybe you guys could afford some things, maybe if you don't travel all day, or maybe if you go to just normal public places instead of some 5-star restaurant. After some time, he might make enough money, but why don't men have to value money if this is apparently why women need to value his money? Is she starting a family and marrying?

Then there's insecurity. If a woman is insecure about something, people begin campaigns commanding everyone to appreciate these women no matter what, especially if it's about weight, promiscuity, etc. If a man is insecure about something, he is told he has a bad personality and needs to develop confidence, and that he isn't owed anything.

Insecure people aren't necessarily bad partners. They don't always ask for reassurance at all times or guilt-trip you. Some might, some might not. It depends on how they manage it. Hell, having a partner who cares about them can be enough to help them manage it on their own or at least without doing those 2 things people say all of them do.

It's not that men don't value confidence. They don't find it unattractive. The thing is: they aren't going to ghost a woman easily over the slightest insecurity she has, nor do people put all these extreme pressure on women to be confident and call them red flags if they aren't.

Nor do men value money in a woman way too much, if at all. Women appear to value it because it's evolutionarily hardwired in them.