Multiple factors imo. These are general trends. There are obviously exceptions and overlaps. The issue itself is pretty deep though.
Western culture has generally been the dominant culture. Due to decades of exposure to and dominance by the Western cultures, more people get it and relate to it...
Gorgeous.
As much as I like Jerry's song and think it would probably bring a better result, I'm rooting for Krut. This is a perfect year for this kind of entry. Very little risk.
I like Demchuk. But even if I didn't, he at least provides some variety in the context of the other 9 entries. Skylerr's "ethno bop" ground is already covered by Sound System, Jerry, and Fiinka, all three of whom did a much better job with it.