My parents completely understand why I made the choice to not have kids. My brother and sister were two of those that said I'd regret it.
All three of us are adopted, so in essence our bloodline starts or stops with us. Years ago my sister bought the whole family ancestry kits from "23 And Me". I really didn't care so I postponed the test until 2023. My siblings both found birth family members, my sister found her birth mother and a couple half siblings. I'm not sure what my brother found, he's a quiet guy. None of that sounded good to me, I already have parents and a family. When I eventually did the test I found a couple cousins but haven't contacted them. I did find that both sides of my birth parents families came from WV and were coal miners for generations.
But the best part was that I found out I was more Scandinavian than my dad, that's a huge issue in my family.
For decades my dad was pure Swedish. He was the chief of the local Vikings club for decades. He has Swedish knick knacks and pictures and posters and signs.....
Our last name is very Swedish. He has made and given away Dala horses for years, he loves and bakes Limpa Rye bread and pickles his own fish.
Well, his test shows he's 75% Irish and only 15% Swedish.

I'm 54% Italian and 43% Scandinavian, most likely Norwegian.
We all thought this was hilarious.