While other commenters are correct about the marketing in some aspects. As a parent of teenagers I will say if they don't have an iPhone they will be mocked relentlessly. The whole bubble color thing is real. They think androids are for poor people even though androids have a much larger range of price. This isn't a "my kids" thing. This is a "everyone in school thinks" thing.
God help me when they get their next upgrade and suddenly my chargers start going missing because "someone stole" theirs...