When I started to RP in EVE, I knew only a few things about what I wanted:
(1) Combat.
(2) Minmatar.
(3) Rationality.
So I rolled up a Brutor, Kudon Astraisx, and worked my way into EM because, as a new player, I had the impression that U'K consisted of, well, psychos. (Note, I'm not saying that I had a correct impression, then or now.)
I didn't really get the tribal thing, actually. Minmatar just looked badass and had lots of dakka dakka, plus the whole "rebel/punk" motif. So instead, I RPed that Kudon's primary loyalty lay with the Republic Fleet and the Republic itself rather than his tribe, because this fit into a nationalistic pattern I understood well from RL. (In retrospect, I probably should have gone Caldari at that point.)
Note, that doesn't mean I had no RP experience; on the contrary. But most of it lay in Star Wars, a universe I already understood intimately from childhood forward. (My dad raised me with tales of Obi-wan, Luke, and Anakin the way other dads raised their kids with Grimm's fairy tales). When I suddenly found myself in a layered, complex fictional setting that I didn't already know, I fell back on what seemed (a) interesting and (b) easy to understand.
My point in all that long-windedness is that roleplayers new to EVE frequently don't know where to start, so they go with what they know. And one of the things "we" know is loyalty to Westphalian nation-states (as well as to criminal gangs).
So yes, many characters will at least start out as basically whatever the in-game character creator spits out. That means characters not much more than a faction and a gender and maybe an idea about a profession.