Except for the minor detail that you can sufficiently test someone's math abilities without the use of a calculator? Or so was the case for me in the '70s when

Except for the minor detail that you can sufficiently test someone's math abilities without the use of a calculator? Or so was the case for me in the '70s when demanding one was out of the question, and e.g. MIT had to figure out if I, and the N thousand other students they offered admission to, could hack the calculus required by the core curriculum (one term beyond the AP Calculus BC sequence (single variable through infinite series)).