[bonobo]

I thought they were talking about dichromatism, I missed the part where they say it fixes anomalous trochromatism only. It makes sense now, thanks.

[jacobolus]

Deuteranomaly/protanomaly are between them something like 2.5 times as common as deuteranopia/protanopia (other color vision deficiencies besides those four are very rare). So this should still be very helpful to most “colorblind” people.