I'm not advocating that teenagers should save no money. I'm just saying you don't have to save "all" of it.
Good financial planning isn't just not spending every cent when you can, it's also figuring out how to get the most out of your money. There is plenty of expensive stuff that I've spent thousands of hours with, which makes them totally worth the investment. There's no way a teenager would be able to figure that out without some trial and error.
I'd say it's better to get that out of the way now than later. If you make a bad purchase decision as a teenager, at most you're short 200 dollars. Maybe that startup idea isn't exactly what you imagined it to be, but at least you figured that out now than after sinking 20k into MLMs.
No, the 2037 problem is fixing the Y2k38 problem in 2037.
Before that there's no problem :)