I feel like this is largely because if you can identify one trans woman, and are right, you think everyone who looks that way is also one. (Because sorry transmasc, you don’t exist to society as anything more than feminine gay man)

Which is why cis women, especially butch women, are frequently accused of being trans.. we don’t meet the stereotype of femininity, and thus must be men, rather than just.. women who aren’t hyperfeminine..