I agree, understand and appreciate.
I want to clarify, though, that in talking about the unfortunate number of OSS projects which convey the "if you're here, you need no explanation", I am absolutely not hung up on profit motives.
Instead, I am talking about the times where you are searching for a technical solution with only a vague intuition about the shape of an approach and some faith that it might exist. And you land on a project homepage that contains so little context that the only reasonable reaction is to have serious doubts that you're in the right place.
You're right, I do care. I have spent a huge amount of my life publishing OSS under different licenses and I want people to experience maximum benefit from that effort. It boggles my mind that people work so hard to build useful tools and then appear to actively gaslight potential users into feeling inadequate instead of attempting even the most basic onboarding advice.
Folks are not obligated to make their code or projects accessible, but if you can't justify even a simple "this is why this exists" statement somewhere prominent that conveys intent without inference or telepathy, I believe that they give up their right to grumble that nothing they do matters and nobody cares.