Against it for what reason? Your argument seems to stem from the fact you are under the misconception that it is racial gear, when that couldn't be further from the truth. It's not racial gear like the starting sets, and is simply crafted gear that for some arbitrary reason has a different a appearance based on the race that wears it. That's not "racial flavor" its basically the same as when they take one set and make vastly different models for male and female characters for no reason other than they felt like it. It's just underwear friend, it being unlocked for all characters to use multiple styles isn't going to hurt anyone. Frankly since a dev replied years ago saying they'd look into it or try to do it, I think we deserve an update at the very least.
Do you realize how ridiculous it sounds to be saying that a character shouldn't be able to wear a different style of underwear based on their race?