There is no "pro-abortion", there is "pro-choice", as in people are free to not abort for moral or any other reasons.
I don't disagree with you, it's a complicated moral issue, I do not advocate for using abortion as birth control, but forcing women to birth and raise children when they can't afford them or even do not want them creates a lot of problems for those children down the line.
Mindlessly breeding people into poverty is no more humane than aborting a clump of cells.