True, it’s hardly a complete explanation. But it at least makes it easier to rationalize it as “because effects budget” than might otherwise be the case.
(Alternate comedy option: Starfleet isn’t human-dominated, it’s actually Lanthanite-dominated and they just got better about hiding the accent.)
Eh, the problem I have with that approach is that in my case, Adderall helps me do stuff like “get the trash out to the dumpster” and “make phone calls”. Executive dysfunction is a bitch and a half for plenty of reasons that’d still be there even if we finally attained fully automated luxury gay space communism.
Regarding the humanocentrism, there was one possible explanation I hit on while playing Star Trek Online and noticing the availability of species-specific ships (such as the Atrox carrier and the Andorian escorts) – basically, most member worlds maintain their own independent fleets, but Earth doesn’t. The human prominence in Starfleet is an artifact of that – there’s no official Earth Expeditionary Fleet, so the people who might join it apply to Starfleet instead.
Given how much Gannett is to blame for newspaper consolidation and the resulting shitshow, this feels more like a “let them fight” at best.