To take these points a bit further, the bar for passing the Bechdel Test is incredibly minimal, and I believe intentionally so, in order to emphasize just how many works fail to pass even so minimal a test.
But is it, really, all that trivial to pass?
Compare with real life. How often, when any two women are having a conversation with each other, is it NOT about a man; and if not about a man, is said conversation worthy of being included in a dramatic portrayal?
Implicit in the Bechdel test is NOT just that it be a conversation between two woman about something other than a man; it must ALSO be something that is INTERESTING enough to put up on the screen as part of the narrative.
No one wants to hear Janeway and 7 gossiping with each other about what a little bitch Bilana Torres is, do they?
Does anyone want to hear Troi and Crusher's conversation about whether to use tampons or pads?
Of course not.
One reason that I think it's too easy to overinterpret results of the test is because the test itself represents an almost sarcastic understatement of the problem of disproportionality.
I think it's more a commentary on how insignificant and uninteresting most adult female interactions are, and also a commentary on how most females' lives revolve around the men in their lives.
Now obviously if the stories were about lesbians that wouldn't be the case. But the Star Trek universe isn't a lesbian universe, so of course it would commonly fail the Bechdel test.
Another reason though is that the results are most significant in aggregate. In certain specific cases, disproportionality may be quite justified; you don't have women wading ashore to fight on Iwo Jima any more than you'd have men in a nunnery. In many individual cases, though, one has to wonder why the disproportionality. Star Trek in particular has no excuse, and the under-representation of women can really only be understood in the context of aggregates of the period that reflect the culture and time in which it was made.
Well remember there is a selection bias at work here. We are discussing dramatic presentations. What is it, exactly, that two women commonly talk about with each other, not involving or referring to a man, that the typical television audience would be interested in watching a T.V. show about?