Another thing that can happen is you can grow up able to see clearly that you're an obligation for your parents they didn't want. You feel like they're always angry with you even if you're perfectly behaved. Then they tell you they gave up their entire life for you, clearly bitter and regretting that.
There is a non zero chance I could make my kids feel this awful for existing, and that already would be a non starter. But on top of that there's like 14 other reasons.
I'm not sure what you're protesting about what I wrote. I didn't attack you. I just don't understand how people ignore all the anxiety they will certainly have with kids in addition to all the other additional anxiety if anything about the kid goes especially wrong.