I mean, the idea of Alpha, Beta, Omega, etc when it comes to males in nature almost always has to do with access to females/dominance in an individual's pride, pack, horde, group, etc. Humans don't, and have never worked like that. We pick our mates based on peer-to-peer qualities, it's more or less mutual (disregarding arranged marriages, which are a product of advanced society, not our innate nature). Humans don't compete over mates like a goat would, or compete for leadership over a group like a chicken or lion would, we just don't work like that. So the idea of associating "shyness" or "a lack of aggressive behavior" as beta, and alpha as the opposite, is disingenuous to the human condition. Humans like to compare themselves to other animals, I mean just look at most American football, Soccer, Hockey, or Baseball teams, all named after animals. Some people just like to use "Alpha" "Beta" etc to connect themselves to something "primal". That's just not in our genealogy to act that way.