Right, exactly. That's what I'm saying, I don't know what you're disagreeing with. Having a CS degree does not guarantee programming competence. Some people get CS degrees who shouldn't get CS degrees. Some students probably should get flunked out who don't flunk out. Some students graduate from perfectly fine colleges with good grades but zero ability. It happens, hence fizzbuzz. Some people are just naturally good at marketing themselves, and show up with multiple degrees from top-tier schools, vast lists of publications, with years (if not decades) of industry experience on their resumes in important-sounding positions doing impressive and difficult-sounding tasks, and can't code their way out of a paper bag. Hence fizzbuzz.

Why are universities graduating people who can't pass programming 101? Why are they so grossly negligent? They diluted the value of my degree, by graduating too many clueless people.

I did lots of problem sets, homework, and coding projects in school. Why do I have to do it again FOR EACH JOB INTERVIEW? Especially since the projects are usually less on-topic than the ones I did in school.

I.e., I do a homework project for a class, and if I don't get an A, I usually get a reason why not. I do a coding interview project, it goes into a black hole and I never hear from them again.

I think it's because CS and software development are different things with some overlap if you Venn diagrammed it. It doesn't necessarily mean the university is negligent or incompetent. It means that what constitutes the content of a good CS education doesn't map to in-the-trenches software development. It also probably means the schools reward and incentivize different things than a software development firm does.