I think we also tend to teach people to not read documentation (or spend time learning anything, really).
Maybe there is some kind of negative reinforcement, too. The way it feels to me is: "I won't write documentation, because users don't read it -> Oh great, I will use ChatGPT to support my users -> The users don't know how to read documentation (or anything other than a 500-letters answer to a chat question) because they do everything with ChatGPT-like prompts -> I won't write documentation, because users don't read it".
Same for many things: most people tend to complain about CMake, but almost every time, I quickly realize that they don't know how to use CMake. Either they complain about it and never used it, or they complain and use it wrong. Therefore many devs try to build alternatives that will solve that problem by "being better than CMake". Turns out I have seen Meson projects that were a big mess, it's not just a CMake thing. On the other hand, people who learn how to use Autotool/CMake/Meson usually manage to make it quite maintainable.
Here the negative reinforcement would be: "People don't learn how to use the tools properly -> They make a mess -> They complain about the tool -> Someone makes a "better tool" -> People don't learn the new tool and make a mess -> repeat.
I truly believe that we could solve many problems by teaching people how to learn, instead of building technology that helps them being productive without learning.
CMake has a bit of a documentation problem, though. Firstly because the tool really was pretty bad at the start and the correct way to use it is the new way, but all the examples people run into in the wild are generally using it wrong, and this becomes self-perpetuating. The second issue is that the main documentation is actually really light on examples, it's just a fairly dry (and not always helpful) description of each part of it. I know there's some pretty good books but that isn't the kind of resource a lot of people are going to use when learning a tool, especially a tool they regard as secondary to their actual goal.
I totally agree that copy-pasting examples from random websites is a bad idea, because there is a very high likelihood that those examples use it wrong.
Regarding the CMake documentation, though, I have been relying on it forever (that's pretty much how I learned CMake), and I personally find it pretty good. That is where I believe there may be some kind of cultural change: I am fine reading the manual (`$ man <command>`) and RFCs and documentation like the CMake one. It feels like "the modern way" is to find an example that does what you need and mimic it (hence the success of stuff like Copilot).
I just feel like my way is more powerful: I can both leverage official documentation (and RFCs, etc) and examples, and I can actually use them together (e.g. read the example, see new stuff there, and go read the official docs about those new things). IMHO, only being able to rely on examples that do almost exactly what one needs is a bit of a loss; people should learn to read actual manuals.
Maybe there is some kind of negative reinforcement, too. The way it feels to me is: "I won't write documentation, because users don't read it -> Oh great, I will use ChatGPT to support my users -> The users don't know how to read documentation (or anything other than a 500-letters answer to a chat question) because they do everything with ChatGPT-like prompts -> I won't write documentation, because users don't read it".
Same for many things: most people tend to complain about CMake, but almost every time, I quickly realize that they don't know how to use CMake. Either they complain about it and never used it, or they complain and use it wrong. Therefore many devs try to build alternatives that will solve that problem by "being better than CMake". Turns out I have seen Meson projects that were a big mess, it's not just a CMake thing. On the other hand, people who learn how to use Autotool/CMake/Meson usually manage to make it quite maintainable.
Here the negative reinforcement would be: "People don't learn how to use the tools properly -> They make a mess -> They complain about the tool -> Someone makes a "better tool" -> People don't learn the new tool and make a mess -> repeat.
I truly believe that we could solve many problems by teaching people how to learn, instead of building technology that helps them being productive without learning.