Messing around with Raspberry Pis is kid shit by comparison. It's fun, but it's not going to advance much of anything. The Raspberry Pi is literally a "get kids into STEM" initiative, and yet it's used mainly by adults who want to cosplay as "makers". And even then, eventually they usually end up in a drawer.
If you want to mess around, Raspberry Pi game consoles are fine but if you want to make a significant contribution, time's a-wastin'. If the rocket takes off and you're not on it, there goes your chance. So yes, set a time limit on the kid shit. Put it away by age 20 or so, and start thinking about what really matters and what's really gonna change things.
> spend their time doing things other people don't regard as valuable...
Sprig is an educational project, shepherded by adults affiliated with big name institutions like MIT and Google. They are extremely conventionally successful smart people who think "nurturing programming talent" is valuable. What are we even talking about? These things don't happen in a vacuum.
Trust me, people don't get into programming video games for the money.
Anyway, this is a funny perspective. Zach Latta, the Hack Club founder, got a Thiel Fellowship. I would not characterize Peter Thiel's philanthropy as 100% mission driven. I also don't think he's a supervillian. But there is a finance angle, not a negative one, to even the most seemingly twee retrocomputing things.
Maybe if you saw Hack Club's deck, you would comprehend.
Any talented non-college enrolled young person could also consider a Thiel Fellowship. There are many opportunities out there.