The best case scenario, and the most benign, is that this is a man who lacks awareness of what it's like for a girl, lacks awareness of appropriate boundaries, and lacks empathy.
He could be a genuinely lovely and kind man who really feels better for wearing women's clothing. And really wanted to help a girl out and was exceptionally helpful.
It doesn't really make much difference to the girl, does it. She's still distressed, disturbed, upset, frightened, 'freaked out'.
But hey, who cares, right? She's just some phobe who hasn't learned her place yet. I'm sure the right side of history will teach her that she's a disgusting gross bigot in due course. And she'll learn that it's fine for her to accept the help of men, even those who 'freak her out', and she'll seek education to get over her bigotry and reframe her trauma, and know to use the correct pronouns.