“Because my friends have one” is one of the absolute best reasons for a middle schooler. It just doesn’t sound like a good reason to an adult. If the other kids are all playing a game the one without a phone is left out.
It's a bit funny that at the same time it doesn't sound good reason to an adult, it is one of the main reasons adults buy all kind of stuff themselves. Keeping up with Joneses...
Nothing like finishing a conversation with your child about the lack of need for a smartphone then jumping into your financed 2023 BMW SUV when a 1987 Toyota would fulfil the requirements.
Because it’s not about the price. And you’re the adult, you earn the money, you’re not required to share a fixed percentage of income with your children.