Using LRP as an example, Pilot Captains are Aircraft Commander and Crew Commanders. They sign for aircraft, and lead crews of up to 14+ people and sometimes a small maint team on deployments to foreign countries to conduct operations. They pass upgrades, boards and are appointed to their Skipper position ultimately with the CO blessing. ACSOs are Lead ACSOs (TacNavs) and also crew commanders, also after successfully navigating upgrades, boards, and CO appointment. AES Op Snr and Jnr NCOs are appointed as Lead AES Op by COs and charged with many aspects of leadership and responsibility, including assessment of subordinates and their flying/trade proficiency. Flight Engineers are responsible for the maint folks, AC serviceability, weight/balance. They can range in rank from Cpl to MWO and are also appointed as Lead FE by the CO. A top category Cpl can effectively be a Basic Category qual MCpl -> MWOs boss for all things flying related.
Despite all of the responsibility and trust bestowed on these folks...it's somehow above their ability to oversee a fitness test?
We, as the CAF, entrust things like UDIs to Warrant/Petty Officers, Junior Officers. Designated Assistants...same. Summary Trial, Remedial Measures to correct Conduct/Performance deficiencies. These are all done by the same people who could administer a simple fitness test.
I'm not a fan of 'wide brush' restrictions or policy to prevent something that "might happen" on a limited level. Punish those who abuse their authority. Simple. If we can't be trusted with a fitness test, we're truly fucked and should be disbanded as a military.