Educated and highly intelligent are two words that do not spring immediately to mind in describing the women at these places. They make great pretensions about knowing how to talk to any guest from any walk of life, blah, blah, blah, but a Cartier watch does not a classy chick make. They are what they are. Impossible to make more of them than that. .
I'm sure you have more experience than me with these places, you're welcome to it.
I do know that I spoke in depth to at least 3 women at the place I went to, they
were accomplished, well educated (the level of English helped to highlight this) and extremely intelligent.
Perhaps you feel better writing them all off the way you have. But then, you are what you are....
(One thing in Roppongi's favour, less yakuza operate here than in other more 'respectable' districts. Of course the people who'll notice this most are the bar and izakaya owners rather than those who frequent them).