Still they exist, just look for them on parenting forums, reddit threads, facebook groups. But yes, a lot of them is about having chrildren too early
Take it with a grain of salt though, it’s purely anecdotal.
In any case, how you feel on your deathbed is about the least relevant feeling you will ever have in your life.
Regretting that you haven't done anything significant in your life is as probable as regretting you haven't had enough fun.
Here is a nice article that made me think about this https://medium.com/@rikardhjort/the-deathbed-fallacy-5e54d96...
Plenty of people who lost their jobs and opportunities because they shirked on work wish that. I've personally wished I'd spent more time at the office, so it is definitely not "no-one" who wishes that.
The broader point here is not to confuse what we want to be -- either the stories we tell ourselves or chew-on from emotionally inspiring stories -- with what we actually are as animals trying to survive in this crazy world. It's not conventional wisdom that what you think now matters more than on your deathbed, but one shouldn't be a slave to conventional wisdom so severely that they can't conceive of non-conventional wisdom as true.
You also don't need to worship someone's word just because they were famous. If Keynes wanted to contribute to my happiness, he needs to do more than produce trite quotes. Perhaps champagne would have lead to that, but it is doubtful. In any case, real people aren't playing a statistical game; whether or not I am likely to regret something is analogous to whether or not I am likely to live with a German Shepherd. Statistics say "no", but the truth doesn't need to confirm or support that, because the statistics are based on missing information that I actually possess. The information you possess about your own life is a tool you should leverage to ignore such silly quotes.
This point of you'll regret it anyway is wrong in my opinion. I believe you are way more likely to regret things you've never done than thing you have done.
And that's why it's wrong, you can make relatively sound decisions using degree of regret as a measure as opposed to assuming you will regret it equally ... when you look at your life and project yourself to your deathbed imagine how you'd feel.