It's because at the end of the day you see the girls, not orgs.
We all have some orgs we like less for whatever reasons, but if their atf comes there, most people will likely go there anyway. I'm not a fan of ebk or Alpacas or most of Sam's shop. But if Diva, Snow, Yoko come through... I would go see them (after full vaxxing, of course).
So the orgs prime really depends on what girls are in the lineup. KGA was amazing for me when it was Claire Miko and Yuna. LovelyAngels was a powerhouse with Yuffie Haven and Tia. And so forth.