Car-centric urban planning is hell with kids. You have to load them up into the car for any small trip. You can't walk or bike anywhere because cars make it so dangerous.
My only regret about living in the US is this car hellscape that is so hard to avoid. It's mandated by law, not chosen by the market.
When the MTA prioritizes accessibility projects they take this into consideration and prioritize stations that have few options for alternatives.
I will also point out that buses exist in NYC.
The only people I see carrying a pram up/down stairs without help are dads who were happy to do it themselves.
And of course there are different types of disability. You’d much rather be blind in NYC than blind in Omaha Nebraska in regard to your ability to get around.
Another kvetch: using car seats in taxis. Maybe it's different now with Uber but 20 years ago the drivers hated it because you have to find the seat belt and secure the car seat...
Ubers/taxis with car seats are no big deal as long as you’re quick about setting them up. And even then, kids are only in full blown car seats for a few short years.