> It's not specific to their height
Of course it is because it's relative to how tall they are. But taller women already don't expect you to tower over them, because that's hard to find, so it's ok if you don't.
> and obviously not specific to their race.
It is within a specific ethnicity and generation. If you're in a country where the men in a specific age are short because food was scarce 2-3 decades ago, they're not all single because their women aren't attracted to them.
And depending on culture and economic class, it matters more what impresses their parents, which is being a doctor-lawyer-astronaut who owns a house.