That being said, I am still mentally ill enough to seriously consider marrying + "fixing" a sad girl, and I do not see any happy endings on the horizon with such a future. Difficult? Yes. Worth it? Who knows. Will I still go through with it? Most likely, even though I realistically shouldn't, I will put my money where my mouth is when given the opportunity.
Edit: I assume you mean a vtuber sad girl. In which case I have a sort of similar outlook. Like, given the chance to date IRyS by some crazy random stroke of luck, of course I would take that opportunity even though we're probably not compatible (she's a creative type and I'm....boring...but maybe she wants someone she can just relax around...wait I'm getting side-tracked). But obviously I know the chance of that is 0.000000001% (rounded up).
Realistically, I'd do it, but also realistically, I know it would never happen. So for example if IRyS were happily married, crazy imaginary fantasy world me would be totally jealous, but irl me would be super happy for her.