I think we might be agreeing, it’s just that “mediocre” means different things to each of us. My team supports human spaceflight, and no one we have is crummy. The “mediocre” people have pretty decent technical skills if you’re looking across all software development domains.
Personally, I’ve found the decent technical skills to be easier to come by than the other ones, and having all of them in one package is a real discriminator.