This only goes to prove I am nowhere near ready to discuss things with someone in real life.
I wouldn't necessarily draw that conclusion unless you're proposing to discuss it with radical feminists. A lot of non feminists (and even alas some feminists too), would be amenable to the argument "look, I can't be a bigot, this trans person agrees with me"
Welcoming male voices that appear to agree with our "controversial" point of view, is how most people feel in the early stages of their feminist consciousness being raised. It's a journey many have been on.
Eventually though, a lot of us begin to question who really gains from this approach and conclude that ultimately it doesn't improve outcomes for women and girls.