the man with 1,000 kids

for those who don't know i'm talking about the Netflix doc with this name. TLDR a man donated sperm to thousands of women and he has around 500 confirmed children but possibly a lot more. this was mostly in the Netherlands but he went to numerous sperm banks all over the world under multiple aliases and also donated directly to some women. i'm pretty sure legal action has been taken so he isn't able to do this anymore.

will this have a real impact on like, genetic diversity? i took like 3 bio classes in college so i have no real idea what im talking about but my limited knowledge has me thinking this is pretty bad. 3 of the kids already ended up at the same daycare. it's also very common for parents to not tell their kids that they're donor conceived... hopefully that's changing in the future.

what happens when half siblings inevitably have children together? or their kids have children together - that would be even harder to track. and just thinking about how many offspring he'll have in 100 years... if his 500 kids each have 1.5 kids that's 750 grandkids!!! and if they have 1.5 kids that's over 1,000!!!