[coffeeindex]

(Did not read the article, can’t speak to the exact argument the OP made)

I like this argument in the sense that JavaScript & HTML were/are awesome because you can learn from websites that you like the look of. You can just pop open inspect and directly see how to do something.

Modern frameworks have largely broken this to the point that it’s pretty difficult to understand what’s going on on a lot of pages

[YmiYugy]

Yes, but it's not the fault of these frameworks. If people wanted to they could ship source maps on purpose and not just accidentally. Not exposing source code was one of the early drivers for tooling.