"you can't call people eggs because some have internalized bigotries and they will push themselves further into the closet" personally i think it's good to force others to face their bigotries
average tumblr user imagines a perfect post gender future, but wants to achieve it in a way that won't inconvenience anyone because that's rude
Also, if someone refuses to accept they're trans, saying that they might be isn't the thing pushing them further into the closet, it's their existing bigotries. Meanwhile, a lot of trans people of every gender didn't know that being trans was an option until someone said it. Or even worse, they insist that they can't be trans because of XYZ and someone telling them that they can be trans, that they're allowed to be trans, is what pushes them out of the closet.
I care a lot more about helping trans people become themselves than offending someone who wouldn't accept their own trans-ness either way.