I'm going to assume that you don't work, for instance, as a schoolteacher (probably a safe assumption on this site).
How do you think your childhood teachers feel about your attitude (of not being interested in going into the teaching profession)? Lucky for you that they didn't share it, right?
How about working in local government, as a mayor or alderman for instance? Did you ever do that? Lucky for you that someone else did, right?
Do you feel bad for not doing these jobs that are essential for society?
None of those other jobs not being filled would have literally kept me from existing, so the comparison seems strange to me. Yes I'm glad someone became a school teacher to teach me, but my not having the same interest doesn't make universal education of young children impossible, only a small percentage of the population needs to teach to enable that. Same for local government and most other jobs.
My parents forgoing having children, however, literally makes my existence impossible. And practiced on a society-wide level it ultimately leads to the extinction of the human race. Anyone who thinks that humans are better off pursuing their own fulfillment and enjoyment out of life instead of bearing and raising children is some combination of hedonist, nihilist, and misanthrope. And anyone who promotes such views should be shamed for what they are.
This argument does not invalidate the original comment. I think my parents were stupid to have me and could have enjoyed their life better. I think i had two of the top 10 parents worldwide but still, it was a decision made with naivety and stupidity of youth.