It’s not someone else’s responsibility to provide a reason for you to fight / live, care for you when you’re old, or help you change things you don’t like.
It's called society, the thing we all live in that only works because of collective will and effort.
None of those things benefits the kid being born.
Giving up now is worse for them.
Having kids is morally wrong.
Morality has nothing to do with it. Not a single atom in the universe consented to its own existence.