That's the exact point I'm making. That whole thing is based on biased and bad science. People always cite this accident never even having read the NTSB report. The FE and the Captain on that flight, both looking at the same runway, both color normal, made no mention of 4 red PAPI lights on the CVR. There is some evidence that the PAPI system itself is flawed, especially when condensation is a factor, with lights appearing "Pinkish". That runway is also a known "black hole" area at night. Another major problem was fatigue. Color vision was not to blame here..

"According to the flight engineer, the pilots were not rushed during the approach to
TLH. The flight engineer stated that, after they completed the before landing checklist, he
turned to his instrument panel to scan the instruments.20 He checked the fuel indicators,
turned off the right air conditioning pack, and ensured that temperature, hydraulic, and
electrical indications were good for landing. He stated that everything looked and felt
normal until he started to feel like they were in turbulence. He said that when he felt the
ěturbulenceî and looked out the front windshield, the airplane was in a slight
right-wing-low attitude and he realized that they were going to hit something. None of the
flight crewmembers indicated that they ever saw all red lights on the PAPI during the
approach"

http://www.ntsb.gov/doclib/reports/2004/aar0402.pdf