Yes. I think she is right.
Compared to Norway, British children are "babied". A Lot.
But what is the alternative? In Norway you have open spaces, children playing out every where, learning to be independent, picking blueberries, making dens in the woods. Have mostly big gardens with trampolines and some such. Friends running in and out.
Ferrying children around to activities, having every day of the week taken by Violin, Stage Coach, Kumon, Tutoring, Dance, etc, I think it is a British Urban (middle class?) phenomenon.
Getting a "playdate" arranged is neigh impossible, everyone is so busy.
In Norway children mostly do ONE activity, like Football, gymnastics, riding, skiing, music, and the rest of the time is spent having leisure time with friends. Visiting in groups, going to the local football or basket ball pitch, or meet up with a group to go skiing, even at primary age.
The flip side of this independence is minimal parental involvement and guidance, bullying, teasing, getting into scrapes, whereas the parents say "well, I was not there, the kids will have to sort it out between themselves". They become incredibly street smart and "independent", but at a cost to both self confidence and ability to concentrate in school, as the "unrest" will bleed into the school environment as well. Kids who are used to do what they want, rarely react well to discipline from teachers.
While I agree with some of the point she is making, which I suspect she has seen from her very narrow group of peers, I dont think it is so harmful as she make it out.