One of the projects I'm leading is a small R&D effort to see if a new technique will improve one of our core algorithms. And I have a very bright new junior programmer who has been with the company about 2 years and has a little post-college experience at another company, so he's not totally new.
When I give him work, he gets stuck (it's R&D after all), and blames the library or the API or things like that. It's like the "no there's not a bug in the compiler meme".
I'll take a good chunk of my day and pair with him to show him how to get around the problems, and it seems like he gets it, and then the next week when we sync up, he's back to blaming the tools.
My wife's opinion is that it just take a LONG time to learn that you're usually the one who's wrong, not the tools. And she pointed out that we both spent about 5 years in grad school. The biggest lesson of grad school is that you never know what's going on and that you need to figure out your tools, and that you're always the dumb one.
I've always been a little disappointed that I wasted so many prime earning years in grad school, but I think I agree with her here. Grad school is as close to the old "apprentice" model where you don't earn much (if any) money because you're primary goal is to learn the field and you really spend most of your time being in the way or annoying to your grad advisor. You don't bring much value in the time you're there. Much of that is learning how to deal with failure and working around that. (Edited to add: last week I found my archive of code that I wrote in grad school. I was surprised how little code I produced in those years and how I could now have solved the problem in about a week or so since I understand what tooling I now have at my disposal. But I did learn a ton in those years.)
I'm trying to figure out a way to get those lessons to my junior teammates (without making them feel as worthless as I did in grad school).
To bring this back to the topic, maybe Lamba school like boot camps are a problem just because the time is so compressed. You need time to keep learning the lesson that it's not the compiler, it's you. And then you can learn the problem solving of how do _I_ make this work.
Lots of self-taught from a young age people learn this, so it's not the grad school that's as important as the freedom to have time to learn (while not being on the hook to be providing value to someone who's paying you).
Not saying it's fair and I understand people need to support themselves, but I do think that the best problem solvers have put in the time and there's not real substitute for time.