I dissagree. These studies are mostly junk science. I bet if they asked questions about whether one regrets their choice of career, they would get similar results.
The same popped into my mind. A proper study would at very least do control questions, to set a baseline for overall "regret". Furthermore, one of the news articles above quoted one individual from a study saying that they "regret" having kid (would not do again if back in time) but the kid is the best gift they ever had. These two claims are contradictory (unless the subject is masochist enough not to want "the best gift ever"). In a proper study, I think contradictory answers like this should be ignore, documented separately, or, the whole study thought again, but instead the scientists chose to count it as "regret". They could also choose the opposite conclusion.
The fundamental question "if you could go back in time, ..." is flawed. If people really could,
even with message from their future selfs, they would realistically end up doing the same choice.
It's easy to do a thought experiment, using the example from one of those studies: OK, so I'm imagining myself having good time with my wife making the kid in January 2022. Let me imagine myself from the future popping up in the ceiling and say: "Hey there, I'm your future self. I came to say that the kid you are now making is the best gift ever, but I would not do it if I could go back in time." Think about it. Would I say to my wife: hey, let's stop, I don't want to? I think the answer is blatantly obvious. Hence, I strongly question numbers like >10% "regretting" because they gave this answer, completely questionable. Instead, the explanation is simple: people who answered "No" to "Would you do it again if you could time travel", did not do a real though experiment. Because the thought experiment required is pretty
complex. You need to motivated for such experiment.
What I
do believe is that the hypothetical time travel question is unintuitive to 10% or so of population - too hard to digest. They are not replying to that question literally. They are replying to a more obvious, simpler question: "would you have another kid now", for which the answer is completely different, especially if they are already old enough and have enough kids.
Therefore, I think control questions about
time travel metaphors, to maintain a baseline of population who cannot answer reliably to the actual question, because they are incapable or unmotivated to do the relatively complex thought experiment, would be in place.
Junk science. Better number could be achieved by proper psychologist discussing with randomly sampled population of parents and making their professional judgement about true regret.