Yes! Perhaps we should have some kind of district-invariant ("standardized") test to verify that students are learning vital technical knowledge before the school recognizes them as having achieved sufficient mastery for a diploma -- and the school as having accomplished one of its critical functions.

(Actually, that's exactly what we do, and when it fails, people complain about "teaching to the test" and suggest dropping the tests instead of the systematic failure to achieve core objectives of the educational infrastructure.)