> In a restaurant they might even learn language and ideas from the adult conversation

Their parents will have their phone in hand while pushing the discussions.

On the general point: I remember a time smaller kids couldn't get into most restaurants at all because they would disturb the atmosphere (and I'm sure there's still many shops that won't allow kids).

Also people are way more susceptible to kids being noisy. It might be because exposure to kids has been so low for the majority of adults, but parents will get an utter amount of flack for letting their kid cry or shout and not immediately cater to them.

It's hard to have it both ways, our modern society will need to be more open to kid noise and disturbance if we want parents to just let the kids be kids.