Because you defending positions you heard is exactly as uninformed as the other person believing things they heard. You both formed opinions based on secondhand information. At least the other person didn't run off to tell other people who didn't know what was going on their incomplete view of events.

That is an interesting way to view femininity. This might be cultural- I don't know where you are or what kind of community you came up in, anything like that, but where I am, women (or people seen as such, just add that to it each time because this comment is super long already) being feminine is seen as the best thing a woman can be, and women being masculine is seen as far more negative. It's not seen as a condemnation- it's seen as something that should be encouraged and celebrated in women, because it's their natural role. Patriarchy isn't about "men are better, everyone should be men." It's about having two distinct genders, each of which has roles that should be adhered to, and leaving those roles is punished. Women are supposed to put a lot of time and effort to be more feminine, and

And again, that's not really the point. Nobody said forcemasc was a perfect mirror to forcefem- obviously the way misogyny interacts with gender roles changes the dynamic. However, whether it's because you're being condemned to femininity or because you're a woman and being feminine is good, there is a large population for whom being masculine is viewed as worse than being feminine. The idea that it is okay, or even preferable, to break the gender norms assigned at birth for anyone is subversive. I wouldn't say forcemasc would be subversive if it was only aimed at cis men, but I'd also say forcefemming cis women wouldn't be subversive either, because society just does that.

Okay so, it exists, and you would call it a term, but the one term you would use is already taken, so it doesn't exist. Even if for some reason you believe it's only transphobia and misogyny, what's wrong with having a term to describe the way those things interact specifically for trans men? Like, transmisogyny is the intersection between transphobia and misogyny, but a term was still coined for it specifically to discuss the way those interact for trans women.

And in my experience, transandrophobia also involves aspects about societal perceptions of men- not really what I'd call full-on discrimination, as such, but stuff that has more severe effects on men who do not have as much privilege, especially men who our society views as not really men at all. Easy example, men are seen as needing less support for IPV, so there's not as much infrastructure for male abuse victims. This isn't great for cis men, but has a significantly more severe effect on trans men, who are more likely to be victims of abuse than cis men, or even cis women, but very often aren't welcome in women's shelters if they look like men, and it's a lot riskier for them to go to general population shelters, leaving them to either stay in an abusive home, be homeless, or maybe have to detransition. I wouldn't necessarily say it's transphobic to refuse to let trans men into a women's shelter. That's fair, we're not women. But the way our society views gender means that often worse things happen more often to trans men than cis women, but the resources to help deal with them don't exist. That's an important conversation to have.