diamond isn't very tough, so in that case, he may have fractured them into many pieces!

Heh!
On topic:
Short answer opinion: I agree.
Long answer opinion: There are many, many, variables, and dynamic factors. Such as:
1. Your intended degree.
2. Your courses of selection (a degree doesn't mean a generalization that your courses are the same from one say Mechanical Engineer from another.
3. This goes out the window upon having several completed projects, initial jobs, etc. But that initial entry level college job would not be open, if you had not proven or had the base accredited knowledge.
4. High school should already prepare you for a basic societal working. Don't expect a glamorous job, but these jobs are more your labor, and common sense, and courtesy.
5. As long as you financially plan well, and have intended goals of where you want to be, then the path can be woven either way. If a path through college is not ideal (longer time/more money wise) to your goal, then clearly there is other avenues.
6. College is more of a guided education anyways. Last I checked, most teachers spoon feed you things in high school. College, there is not any of it, most of that learning effort is more upon the student taking active roles to the professor, TA's, and other students.
7. Success is not one thing. It is a flag if you have reached your intended goal.
8. I am sick, I maybe speaking out of line.