People took their children places for centuries without strollers and cars. The dependance on wheeled conveyances for children is baffling to me, I feel like some parents have an aversion to holding their kids. Especially the ones who clip a carseat into a stroller and never take them out.
We were gifted a big heavy modern stroller and almost never used it, when the kids were babies we wore them and now they can walk a little we just do that and take breaks. If it's going to be an all-day thing (like a theme park) we'll bring a lightweight umbrella style stroller and those are trivial to fold up and carry.
The accessibility argument makes sense for folks with disabilities but not so with children.