I went to school alone since my second day of elementary school, in Japan kids cross Tokyo streets at the same age.
I have given math lessons for two decades and during that timespan kids have changed a lot due to how much parents changed. It went quickly from "if he doesn't listen you slap him hard" to "how dares the teacher give him a bad grade".
I have brought that topic with some people my age on a programming board and all fellow devs surprisingly told me they agreed, that it is child abandonment and streets are dangerous.
I feel like such over protection makes for young adults that are absolutely unprepared for the harshness of real life.