Not everyone who “skips” having kids is doing so because of mental derangement (not usually genetic), a genetic disease (be careful with eugenics, it tends to bite), or any kind of mistake. Most people I know in their 40s and 50s who don’t have kids desperately wanted them but for one reason or another couldn’t have them, while most of those who actually chose not to had good, well-reasoned motivations and made the correct choice for them.

Spend enough years struggling to find a decent partner and then IFF you eventually do even more years struggling through the inhumane process that is IVF and you’ll also have your aunt’s regret, but not have made any mistakes along the way.