Currently we are all raising kids that will not be ready for the world in 10-20 years. I am sure of that. Kids from other parts of the world will have the advantage in pretty much all fields.
Back then a "little snowflake" was what we called our classmates who froze to death walking home from school in a blizzard!
Here's a fifties school to get an idea: http://aromalefkadas.gr/wp-content/uploads/2014/09/68.jpg
This is from around the fifties. The kids aren't doing yoga or something -- they really don't have shoes -- they usually had just an incredibly warn-out pair at most, which they wore as part of their "good outfit" (for going to important events, church, etc).
No school buses -- actually no highways between lots of rural villages until late 60s, and a single school (in the central/bigger village) catering also for 3-4 nearby villages in what could be a 10-20 km radius.
And yes, they also did that with snow.
The stories of our grandparents are stories that we would associate with a war-torn country in the third world if they happened today.
Where is this? Do you mean by law, or is this just some social expectation? I find it hard to imagine how one would go about enforcing this, and it seems pretty silly for schools in cities and urban areas where kids are often living ~5-10 minutes walk from their school...