Eeek! Depends on where they went to school. I know of one university that values income more than education, and refuses to fail ANYBODY no matter what. I doubt they are unique.

Then you have the professors that teach opinion and not fact, and grade based on that. How valuable is if that someone learned an opinion?

A college degree says that an individual is able to learn, nothing more. It does NOT mean they know anything in particular, nor does it make them an expert. Everyone I know that has taken networking course work in college is of the opinion that it was nothing more than theory and basically useless in the real world. I know my database classes were at least as bad. I would go farther and say that about half the database courses I have taken at professional training schools have been just as useless.