This is more of a question of opinion than an AIBU.
Women have a lot of plates to spin these days, balancing career, social life, family life, children. It's a lot, and women do bear the brunt of it all. Something has to slip for women, it doesn't usually for men. It is very challenging as often if you want to have children, your career does need to hit pause for a few years, or you battle on through and try and spin both plates at once (which can happen, but is tough). I wanted to open up with this because I am not criticising women that choose to wait to have children for any reason, whether they don't want kids yet, want to wait until they are older for career reasons, whether it is down to finances, support networks, childcare, whatever.
I think it is now more of a societal belief that having children below 30 is young. Not medically, just within society. So many people wait until they are 30+, going in to mid 30s, because they are told they are young. I am 30, expecting a baby, and being told I am a "young mum".
AIBU in thinking that people need to also take in to consideration the risks associated with becoming pregnant 35+ (including higher miscarriage risk, birth defect risk), as well as thinking about what happens if you don't get pregnant very easily?
TTC isn't a lightening quick process, it can take a while, and if you have complications or require fertility support, you might have a bit of a lengthy timeline ahead and at that age your body clock is ticking, whether we like it or not. I do know a few women that waited until they were in their mid 30s to start trying, because they felt like it was "the done thing nowadays", and in short they said they regret waiting as long as they did.
This is just an opinion thread. Ultimately it is up to every women what age they do want children, don't want children, there are so many things to consider including finances, support, and so on...but should people have more of an awareness of the full picture and possibilities, rather than society painting a picture of under 30s being young mums?
FWIW, the reason I am thinking about this this morning is that know of people that aren't planning on trying for children until they are in their mid - late thirties purely because they feel like they'd be classed as a young mum if they had children now. No other contributing factors, they have said they can afford a child, aren't bothered about taking time away from work. Want to be a mum, but don't want to be seen as a young mum. They're very open about this belief on social media too.