Bonus fact: Federation ships are segregated!

Different species require different atmospheres and gravities, and accommodation is extremely taxing (see the bird lady episode of DS9).

Enterprise has always been a human ship. An entirely Vulcan crew (of a Nebula class, I think) shows up on DS9.

Also, it's heavily implied that Zephram Cochrane, the (White, male, human) inventor of warp drive, didn't just discover a technology that other species already possessed, but in fact invented if for the first time (in the Alpha Quadrant). It proved so superior to other propulsion systems, nearly everyone adopted it shortly after encountering the Federation.