I'm just guessing here, but I bet it's because they are much better talent evaluators than any of us and get paid millions of dollars for that ability to see a guy's potential.
I do not think this one should IF the coaches do and have done their jobs. This is NOT the worst roster situation UT has had on the OL nor was last year.
"Reasons" become excuses when they're overused or someone has had opportunity to "fix" problems.