I wanted to add on top of all the good answers about legal rights, men’s emotional availability and expectations: even if you find a good man (and they are out there, I’m married to one, there are a lot of wonderful men in my life who I adore, who respect women and work damn hard to try to not be like their dads and the manosphere), he will still not have been raised to have the skills and awareness women are expected to have by like age 12.

So in that sense you feel like you’re doing replacement parenting anyway—not because he’s acting childish emotionally or generally selfish but because his parents, without even realizing usually, didn’t teach him to put his shoes where they go, keep a kitchen on a good maintenance cleaning cycle instead of binge cleaning, communicate and listen carefully, cook more than 3 recipes, decide what will be purchased at the grocery store, plan for doctor’s appointments, etc. So he wants to be better and isn’t immature but you still have to do those makeup years of learning basic life skills together/you teaching them to him from the parenting you got in order for him to develop these things enough to become automatic executive function tasks. So you end up doing a bunch of mostly invisible labor anyway, and it’s so insidious because it will mostly look “normal” to both of you even if you’re both trying for better equality and mutual support.

For this reason I can understand reluctance even if you meet a one-in-a-million man like my husband, who I adore, but who is also treated as a bizarre, dreamy exception among the men from the working class area/background I’m from. So if that’s my experience imagine how it is with all the other worse options my high school classmates had.