It's not about whether your kids will cause climate change. It's about creating children just in time for them to suffer through the collapse of civilisation.
Jokes aside, I have heard both points made. Yours and the one from the parent poster.
https://en.wikipedia.org/wiki/Little_Ice_Age
Yes, the current temperature shift now is greater but it has been ongoing for a much shorter period of time.
That's worse, not better! https://xkcd.com/1732/
Temperature has varied drastically throughout time. There were Vikings growing barley in Greenland, something completely impossible today. The reason you believe otherwise is because climate doomers lie a lot.