Sure, but you'd need to apply it to all phones, because what's stopping a kid from buying an adult smartphone if they have the money? And smartphones can be dirt cheap.
Also remember that the pop-up is an industry choice, the rules only mandate that a user should opt in, not how. No laws mandate the cookie banners, no regulations say they should be obnoxious.
Also remember that the pop-up is an industry choice, the rules only mandate that a user should opt in, not how. No laws mandate the cookie banners, no regulations say they should be obnoxious.