The skills are different now. For starters, in a capitalist driven society, the skills have to match the market. It was discussed in another post, but I can't remember the number of "big show" nitro cars on the planet at any one given time. But let's be generous and say 100, including FIA and IHRA in the count. 1 tuner, and maybe 3~4 people who aspire to tune per car. That's 500 people tops. When shops going forward need CNC programmers, welding robot programmers and maintainers, and all other manner of thing, tech schools aren't going to be focusing on the old school skills needed for nitro tuning imo.
The solution imo is for current chiefs to get together, maybe once each winter break, maybe at PRI or something, and compile what they're willing to share about lessons learned that season, and an editor sit down and find the common ones, and publish it. Also get prior tuners still alive to dump all the history they can remember, that way someone tomorrow doesn't waste time trying something already tried and tested yesterday. Or retry something that maybe we didn't have the technology for yesterday. That way, it's kind of like how encyclopedias got updated every year. Then a person can be like, "hmm, in 2025 édition, didn't so and so say xyz? Maybe it's time to revisit that. Let's try this vs that..."
Right now, it's practically impossible for an aspiring tuner to learn even the basics because there are so few crew spots to even start at the bottom washing parts, so the pool for the future is small unless things change.