What? No one is a "walking stereotype", except people who want
to be such things. And clearly Ferengi do
get rich, so it is obviously possible to climb the socioeconomic ladder in Ferengi society. Aside from their dismissal of their own females, apparently anyone
can go from rags to riches on Ferenginar - they seem very egalitarian. They don't seem to worry about who is socially acceptable, or discriminate against people in anyway beyond whether they're rich or poor. They even have rules about "sucking up to the boss", probably to promote loyalty in a culture that would otherwise degrade it. So I don't think you have raised any good points.