This is a wild fantasy that trans women were ever men. Maybe a boi, but not a man. No man would go through GCS not cross-live for the year nor take the HRT that changes you emotionally. A man would be unwilling to lose his weewee and have instead a woman’s part.
You are obviously correct that that is the way a great many men think, so it is best not to tell them about being a person of transition.
True story. A guy liked a girl. Having listened to the “trans community” — whatever that is — the girl told the guy about herself. He was stricken and blurted, “Why did you have to tell me that! Now I can’t date you anymore,” and he was very sad. “Why did you think I wanted to know that!?”