I think physical fitness tests ought to test relevant physical fitness. That’s done by action, not body measurement. You can be skinny without being “fit” in the slightest.
I read somewhere that Michael Jordan-at the apex of his career-was technically overweight, according to BMI measurements.
When I was in the army I often failed the weight test. Id go to the doc and pass the body fat test because of muscle. Anytime hefty lifting was needed I was called on.