Not sure this necessarily means that everyone is just rolling Default 1990s CRPG Character. You could have a bunch of interesting builds that still end up with this as the combination of the most popular choices
Or it could be that this is just a small plurality. 10% of people choose a boring white guy, but then each of the other options gets like 8%, so even though 90% of players are playing something that isn't just a white guy, technically, the most popular individual choice is white guy.