There are plenty of people who would make terrible parents and absolutely would hate the whole experience of having and raising children.
Agreed! These people aren’t ‘missing out’.
Not having children clearly means that you miss out on the specific experience of raising children, however not having children may lead to missing out on other experiences - parents may have less free cash, less free time, miss out on work, travel etc opportunities.
I actually don’t really agree with this take. I’ll be ‘done’ with children by my early 40s (as in, they’ll all be over 18). With luck that’s decades of good health and good finances left to enjoy holidays, free time, hobbies etc. In fact I look forward to this time a lot, and always joke what me and DH will get up to.
I also had a fab time from aged 18-mid 20s, drinking, travelling, socialising, festivals, living with different groups of people, building my career. I don’t really feel like I “missed out”.
My career certainly has benefited since having children, as my motivation and drive has increased (although I understand this isn’t an option for some women). That drive to “do well” for your kids meant we got on the housing market and chased good jobs, in a way I wouldn’t have if I was just 30 and single/childless.
Obviously you miss out on the specific experience of being childless, but you don’t miss out on all other good stuff in life (travel/freedom/fulfilment etc) just because you had kids. You just dial it back for a couple of years while they’re little. People greatly over exaggerate it imo.