I'm inclined to agree with this. But I'll go further.
Not only don't kids today know pre-1990s fuel metering systems, many don't understand the physics behind how cars work. They not only don't know how to fix a carburetor, they don't even understand how one works. They can't recognize the difference between fuel metering by the carb and fuel metering by sending "engine demand" signals from sensors through an algorithm in a microchip. They know fuel needs to be metered, but they don't actually understand why or how it's done. They know fuel injection is better because some teacher said so, but they don't really understand why.
Automotive technology programs are tasked with taking what they're given and making graduates capable of passing ASE exams (at best). I truly believe that if our primary educational system were doing its job and teaching basic science, and our secondary educational system were doing its job and teaching physics, their way of looking at what they're taught in the automotive programs would be much different, and the knowledge they come out with would be far deeper.
Perhaps it's because I spent 17 years working with the graduates of our primary and secondary educational systems, combined with the fact that I love analysis, that I have this opinion. But when I see high school graduates applying for college that need two years of remediation before they can even begin their freshman classes, and see HS graduates that can barely write an articulate sentence, I worry about the future of my grandchildren.
I also spent 17 years watching my college focus on "asses in the classes" more intensely than the education itself. That's why you see so many totally useless course being offered. They're cheaper to run and the kids like them because they're easy, so they're profitable for the college. You can put 30+ students in the classroom and hire a mid-level adjunct....... and make beaucoup profit.
Sorry about the rant, but I truly believe that's why there are so many "mechanics" out there that can't solve problems unless they've been shown exactly how. They don't understand d the basics.
I should add that I've also worked with a great many truly smart students that truly desire to learn the why and how behind the what. But primary and secondary systems today don't require knowledge to graduate. Many make it available, but few require it.