I can't speak for the other guy, but for me personally, it's not lesbians in general but how forced into "harem" media they've become. Harem is polygamy, but for some reason, people refuse to acknowledge that polyamory and polygamy are different and will reach and make up as many bad faith arguments and excuses as possible just to insert their fetish (lesbian/polyamory/etc.) into said media.
Lesbians on their own? Hot as fuck.
Lesbians made unavoidable in a game that literally advertises itself as polygamy? Not hot at all. (Erm, actually! Just because they eat each other out and make out and are shoving fists inside of each other, it doesn't mean they're lesbian! They could just be doing it for the Mc! It's just a little bit of fun teehee~). Sure, buddy, sure – nice mental gymnastics.
It gets irritating looking for a game or novel of something I like, polygamy, and getting polyamory almost every single time with some guys that have a lesbian/polyamory fetish trying to gaslight me into thinking that I'm the one that's weird for wanting the harem tag to mean actual harem.
It doesn't help that some of the mods are massively problematic and will ban people/remove comments explaining this no matter how politely they're written, power tripping over a pirated game form. Just last week I had a mod remove my posts after a developer lied about a game having lesbian stuff in it, and I was warned for "kinkshaming" when all I did was show in-game images as proof. Like, what?
I know for sure it's not just me who feels this way as you can see the influx of comments asking if Lesbian content will be avoidable, and debating the legitimacy of harem when it's just a lesbian fiesta, especially over the last year.
TLDR: When the hell will the tags be improved on this site.