The fact that you compare this to you wanting to wear a sweatshirt and leggings to work just says it all.
Eh, I sort of get it though. Most people don't enjoy their professional dress or find it hard to express themselves with professional outfits. Some people just straight up don't have a way to express themselves in general when it comes to professional dress, so finding small but professional ways to express that without straying into a territory that is deemed unprofessional by many (as in Eve's case some of the time) is really nice
The other thing with Eve is that I really don't see how being 'queer' means that it's 'special' to dress in a more masculine/feminine way. That's just how identity works in general for most people (we're not really bound to dressing and feeling feminine/masculine 24/7), and as I've mentioned she's always been creative with her outfits (didn't just stick to the black and white combo, suit or dress that you'd traditionally associate with business dress)
It seems that Eve is very lost on her identity as a person right now so she's throwing around 'queer' as a way to find a label of sorts, or she's overstating how much her sexuality really matters in the grand scheme of things - in a work place, it really shouldn't. Though there's been a push with LGBTQ so I wonder if that also party affects her mentality?