I think it's such a boomer-y perspective to treat phones as toys. For a lot of people, smartphones are their main computer. People do their homework, do research, learn languages, fill out forms, and lots of other productive activities.
Even communication is not frivolous. What if someone wants to talk to their father working in a factory in distant Guangdong for their birthday?
Basic macroeconomics: The budget of a sovereign government with control over monetary policy is fundamentally not like a family budget.