If it helps, even devs have problems following the install instructions.
It could be for a lot of reasons. Usually it’s because it’s open source and we can’t test it for every possible configuration. Or we are just trying to code, not deal with the dozen other setups.
Me in particular, all my application projects don’t include node versions, and assume Linux. Even I forget that sometimes if I’m loading a old project and suddenly it doesn’t build, and I have to futz around for an hour eupdating packages.