[weberc2]

Gender matters more than race or height (I.e., race doesn’t make one markedly stronger or un/able to birth children or any of the social roles that emerge out of those properties), and as I mentioned elsewhere, multiracial societies weren’t a universal reality (and aren’t today) such that it would leave a mark on grammar.

[UncleMeat]

Wealth, education, and any number of other categories also matter a ton. We exclusively use gender and perhaps age to label people. Why?

[MaxBarraclough]

We don't. We use titles like 'Professor', 'Captain', 'Pastor', 'Doctor', and 'Congressman'.

[iguy]

Because education didn't exist for most of the last few thousand years. Wealth did, but I guess it wasn't worth modifying your speech of every day to encode that today isn't the one day a year you happen to encountered a nobleman.