>>818496Obvious and simple reason: because people have already standardised on LGBT or variations thereof. the important thing about a standard is that it's a standard, not necessarily that it's the best one.
More complicated reason I explain purely because I find it interesting: As a general rule people don't like to say "sex" if they can avoid it.
(hence the general drift from "sex" to "gender" even independent of rising awareness of transgenderism, and the shift from "transsexual" to "transgender", and of course "gay/lesbian/LGBT" beating "homosexual/homosexuality", though in that case aided by the alternatives also being shorter and snappier.)
You could fix that by making an acronym, but SM is too close to S&M and any other set of words you grab will run into problem one: we already have a standard acronym.
As to the point of the other post: French terms generally sound posh in English, while Germanic ones sound common. If we're going to penalise words for sounding "bourgeois", lots of French-derived terms (including "bourgeois" itself) will have to be "out-rooted".
>>818502The point of pride is surely to emphasise that something isn't shameful when there's an underlying presupposition that it is. e.g. if someone is in the closet out of shame, it's useful to see other people with functioning lives go "not only am I gay, not only am I
not ashamed of being gay, I'm
proud of being gay". The pride is more stated and signalled than necessarily felt.
(In a more progressive society where that's as silly as Victorian prudishness, it'd just be something of an artefact title.)