Some trans kids might think "Oh, this is sort of like me!" but they're also going to think "Am I just some sort of freak imaginary alien?"
.....
Nichole Main in Supergirl .... is actually a fucking alien instead of a Earthling human.
....
I don't think it's lazy but I do think it's very problematic that the first trans character in a series run by a bunch of cis people is being portrayed as an alien, rather than a human from the planet Earth. Really goes to show that cis people shouldn't be given the keys to the car.
To quote Captain Kirk: "Spock, you want to know something?, Everybody's Human."