Appearance matters sometimes. It shouldn't matter all of the time. Sometimes, some of us, with desperate desire to blend in public, want our trans sisters at our side to look "better" in some way--some way that we feel is the "right" way to look or act....
First of all, it really does matter in a few special cases. If you want to get into a posh night club, for example, you need to dress for it. These clubs explicitly advertise that proper dress is required. If your clothes aren't consistent with the look the club is going for, don't be indignant when you are turned away. In *most* cases though, in public places, in venues open to the general public, proper dress is not an issue, and if you feel uncomfortable standing next to someone, that is your problem, not theirs. Seriously, we're all adults, and we accept the consequences of how we dress. We can dress to blend, dress to impress, dress to express, and sometimes, dress the only way we want to, the only way we can, the only way we know how, in the only clothes we have, or--simply and unapologetically--the way we do. In *most* places, this is allowed. So get over it.