The kid had a fun hobby making and tinkering with stuff. Buying him a claw machine means he has less reason to create new things. He now has a complex bit of machinery that he needs to service. (Cost of stocking it; running it; repairing it; etc.) How much space does he have for these machines?
Running a business is fine. But does he really want to be someone who owns an arcade, or does he want to be a design engineer creating tech?
> I'm guessing you had a very controlling parent and have the terrible urge to do the same.