The 20 - 80 rule is made up by copers to make themselves feel less subhuman. The majority of men ARE getting sex and relationships. Only a small proportion of men are incels. +- 5%, the true subhumans, the bottom 5% on the bell curve. In order to be incel you really have to be sub 5th percentile in multiple aspects, be it height, face, frame, social skills, etc. And this is exactly the situation we are in.
That being said, ethnics are a special case. Even if you are not in the bottom 5% for your ethnicity, if you live in a country where the natives mog your race, then you could still be incel. So many ethnics that are technically not subhuman, are incel due to location. And I think if we surveyed this forum we would find out that a very large proportion of users are ethnic.