That's just a standard disclaimer.

This is just how it is out there. Ask teachers what students are like these days. Think about designing for users. Or cross-reference with other info on this topic.

And, in regard to colleges... you have to keep in mind just how many colleges there are, how much the quality differs, the relative workloads of different degrees. There are a lot of people graduating with a GPA quite close to 2.0 at that full range too.

Also, think of how many college graduates never finish a book again after graduating college. Those numbers judge 18 to 65. And the age stats show that the older cohorts drag the scores down significantly.

The only upside to all of this is that it at least makes the chaos out there in the world make a bit more sense.