No one at a convention actually cares about 2D, or even most anime to be honest. Those types of people watch two or three of the more popular shows just so they can keep up on conversations, or to watch the character and wear a costume of it. The rest is the same as any other normie thing, and devolves into flailing their crafted peacock feather suits in hopes of attracting a mate that hour in a public bathroom.
I think of it like the guys who would take sowing or cooking classes in school, just because they're full of girls. They're not actually interested in the subject, just the getting to fuck something that moves. In the case of furries and congoers, it tags along with whatever fetish they have, like animals or dressing up.
As 2D love in the average tohno-chan case doesn't involve 3D, you can't compare it to actually furry.
For just anything 2D, I don't really care, whatever gets your socks off. I like my neko Arc too. I wouldn't consider anything wrong with it myself, since it's not really bestiality, just like loli isn't pedo.
that's a good analogy I think... I'm sure not every furry is actually into 3D animals, just 2D ones, the same for loli and real kids.