It's a reasonable hypothesis that happens to be politically inconvenient, as if it turns out to be the one that best explains the available data, this is another nail in the coffin of an ideology that is already severely weakened by significant challenges in many areas, despite so many of its acolytes having already gone all-in.
It is not any more reasonable as a theory—or even a hypothesis—than the theory that vaccine causes autism or that fossil fuel usage does not contribute to global warming. If there is no evidence to back up a theory—or a hypothesis—it is unreasonable to push it as a possibility.
What is reasonable is to assume that people are pushing these theories (or hypotheses) because they have an agenda. What ROGD is stating is basically that transgender people are contagious. This is a very disgusting thing to believe so they decorate it with science sounding terms and provide compelling—and suspicious—anecdotes to support it. This isn’t science and it is definitely not reasonable. I’m gonna call it what it is, this is hate speech, and it is not reasonable by any definition of that word (not even political convenience).
True but this is a problem more generally. Unfortunately society is being turned this way whether we like it or not, with no thought to effective safeguarding, boundaries or consent.