First of all, we have no idea why the 80% failed.
Also, there do seem to be some items that require more than book tests -- or even practical tests -- on medical knowledge:
Land Navigation
Day and night land navigation courses.
Medical and Casualty Evacuation Tasks
- Evacuate a casualty using a SKED litter and litter carries
- Evacuate casualties using one- or two-person carries or drags
- Extricate a casualty from a vehicle
- Load casualties onto a helicopter, ground evacuation platform, and two nonstandard vehicles
Warrior Skills Tasks
- Correct malfunction of M16 or M4
- Disassemble, assemble, and perform functions check of an M9 pistol and an M16 (or M4) rifle
- Move under direct fire, react to indirect fire, and react to an UXO or possible IED
- Move over, through, and around obstacles
Here's the bottom line . . . if she had dropped out during the march or during any of the other evolutions, like some of the 80% failures probably did, there would have been no video and we wouldn't be having this conversation.
We don't know her time in the march but, let's assume for the sake of argument that she barely met the Army-mandated minimum. As Hawkeye Pierce (in)famously said, "If the minimum weren't good enough, it wouldn't be the minimum." [Remember, M*A*S*H was a comedy!!]
Seriously, I get that it would have been better if she had finished the march, smiling and not out of breath and ready to walk another 12 miles. It would been better if she had earned the highest score, setting an example for everyone around her. But it would have been worse had she quit/failed. She didn't. She passed.
So let's agree to disagree on this one.