When I had IVF (privately through an NHS clinic), I was 34 and the second youngest person in my cohort. The youngest, in her twenties, had her fallopian tubes mangled in a car crash. All the other women were older than me, and were there, because it had taken 10, 15, 20 years for them to be diagnosed with endometriosis.
IIRC, it still takes 7 - 9 years to get a diagnosis of endometriosis on average. It took DD2 5 years to be diagnosed, and she didn’t start complaining to GPs about painful periods for about 3 years. She was repeatedly fobbed off by numerous GPs, that she was too young for it, painful periods are normal, the treatment nowadays is the pill, etc! It was only because I eventually went with her, and told the GP what I’d heard from other women and I didn’t want it happening to DD2, that she was referred for a laparoscopy. The consultant told DD2 to get pregnant in her 20s, because even if he treated it then (which he did), the damage could be too great by her 30s.
So, my guess is that some older women are still ending up, needing IVF, because of the time it took to get endometriosis diagnosed and treated; rather than it being a lifestyle choice. I doubt very much, those older women are going to be commenting on teenage pregnancies, while taken up with the time and expense of IVF?