I agree and disagree as a "marketer". If you're writing a LBGT story that happens to feature homosexual males in a relationship, by default it should be categorized into the BL category?
I do think a larger problem, and it's been one for well over a decade, is how people assume BL = Yaoi in tropes, norms, and so forth. You don't look at the shoujo genre as the hentai genre for example. Hentai, Yaoi and Yuri are all seperate genres from BL, GL, and "romance" stories. It's a hard line and something I feel we've failed to really readily distinguish teh difference between them (as a giant online community, especially people outside Japan absorbing material who think bishoujoai and bishounenai = yuri and yaoi). It's just a problem with terminology that's become a larger problem as "people in the West" (for ease of speaking about this) want to change them into LBGT stories.
In my mind, a LBGT story could equate to a BL or GL (bishounenai or bishoujoai / pretty girl pretty boy love centric stories that focus less if at all on the sexual components of the story). But a LBGT story likely would not equate to hentai, yaoi, or yuri, which in our terms is straight up porn and smut magazines. ::shrugs::
We've had threads in the past about things like this, the culture inside Japan as a creator in relation to BL vs yaoi and so on.
Now, speaking as a creator on Tapas, I think the whole "let's create a BL character!" is fine since you're buying into the BL trope system, but upon using words like seme/uke -you're putting into the realm of yaoi moreso.
It just seems... odd. Since that's porn, and should be limited to the Mature section of their site.
But as a writer of homosexual males who have a story that balances between "wee romance" and "actual plot", I don't feel my story fits into the LBGT genre. That genre as I've seen it over the last few years and now, has always only been "coming out" stories. That doesn't fit into my High Fantasy world, since they don't suffer from oppression in their world that matches ours in a "coming out" story; None of my characters live in fear of "having to come out".