You are correct.
One of the definitions of "Homophobia" is that the person believes there's a "gay agenda" and of course there is! That's why it's part of the definition.
Almost everyone has an "agenda" to promote themselves in some way and the more fucked up you are, them more passion you have for your agenda. Serial killers promote themselves and you would think that they wouldn't want to but they are very motivated to push their personal propaganda. A nice person wants people to think of them as nice and treat others nice, they are pushing a personal propaganda.
There are a LOT of homosexuals in the media and they are pushing an agenda. They are weirdly obsessed with ONE PART of their being, like immature children, and constantly focus on it. Most heterosexuals past the teen years stop obsessing about sex and relationships and settle on bigger issues. Homosexuals do not and so we have "gays" in many TV shows and movies when they are like 1% of the population.
I watch the various DC superhero shows from the CW and there's like 80 gay and trans characters when the average show is about alien invasions or some plot to destroy the world. They don't belong there, but someone is compelled to insert them into stories in a way that's fairly irrelevant.
Supergirl has a alien trans superhero and all of that has nothing to do with anything. No one at work or if I'm in the middle of a crisis asked me about any of that.