Perhaps, but I’m sure they are also aware of the cultures of other species, and having those species in their fleet is still a vital asset for dealing with disputes against or with those species. I’m sure plenty of species don’t mind like vulkans or Klingons, but there are other species that find their collective value in material wealth.

Maybe they give certain species of crew members money to keep them loyal to Starfleet and work.

The real question is why don’t all Half Life characters have a fully modeled cervix?