Everyone thinks that Real Sociedad is the better team and will win, but the reality is that Villareal is a team that likes to get a draw, they will play quite well defensively and I think they will do their best to get a draw here as well. A bet that is a draw OR sociedad win could be better than just Sociedad win. I know that the possibility of Villareal getting a draw from this game is slim, but it is not impossible and we should consider the possibility for sure.
I think the best way to go about this game would be picking the draw. This is of course just my guess and I could be wrong and maybe Sociedad will get the win like many expect, but I think it's quite close to being something that would be a draw and boring game.