The problem isn't necessarily web developers, or certainly not all web developers. Thanks to constant penny pinching, very little gets developed from scratch in-house anymore - instead everything is put together using a myriad of third party code (often cheap third party code) that does things in very opinionated ways, meaning all of their dependencies become your dependencies, and every time you add another third party lib you get more dependencies. So you end up with a gigantic base of dependencies - none of which can easily be eliminated because its just a giant house of cards.

The alternative is every shop building their own functionality from scratch, with the result being 100s of competing libraries all doing very similar things but slightly different.

What needs to happen is the same as in most industries - end users / customers needs to realise the real cost of things and pay that full price. No more cheapest possible solutions. No more making do with lowest common denominators. Pay more money for better solutions.