As others have said, it's not so much that tinkering opportunities don't exist. It's more there's a slump in the market of doing relatively easy jobs for money. You can hack on esp32 all day, but there aren't many ways to make money doing so. Making software for the iPhone was (and is still, at this point) a pretty good gig.

I figure auto mechanics contended with this 25 years ago. Now it's hard to find someone to replace your water pump, if your vehicle even has one. Like auto mechanics, though, these machines still exist and there's still a big market for those skills. It might just require more legwork to find that work.