Regarding her points:
1. No one has ever asked about my GPA.
If college is your terminal degree and you know you will never apply for a higher degree, that might make sense.
2. I didn't sleep.
One would hope that not getting straight A's wouldn't induce sleep, but instead would free up time to do more fun/cool/enlightening things. You'd still be sleep deprived.
3. I've forgotten 95% of it.
Not sure that college is designed to impart information.
4. I didn't have time for people.
5. Work experience is more valuable.
These two seem reasonable.