Probably because it wasn’t really possible before. Now there is a lot of technology making that easy. One of Apple’s big use cases that they sell is the ability to streamline being an overprotective parent
On the other hand, I feel it has been an enabler - the ability to track their phone if they aren't back home when they're supposed to probably allowed me to let my kids go unsupervised to various activities at least a year or two earlier than I would otherwise have; the phone tracking ability meant that they could go to sports practice at the other side of the city on their own with bikes or public transport (depending on season) instead of being "delivered" and supervised by me or the spouse.
stares in child labor I feel like you never spent any time listening to your great grandparents talk about growing up.