No that's not what they mean. They mean you'd kind of assume someone who identifies as queer, or is at least knowledgeable enough on the community to participate in some ways, wouldn't be homophobic.

In practice this isn't the case, because you can use this as a shield. So for homophobic people it might be advantageous to enter the community in a way that causes the least amount of personal friction. Like, simply putting pronouns in your bio and doing literally nothing else is trivial - but the social benefit is not.

It's a big problem, because people who ARE non-binary or ARE bisexual or whatever then get a ton of backlash. Because those identities are the most common to be commandeered, so to speak. At least online.