Because we prioritise physicality over pure footballing talent. Spanish players usually play best with Spanish or Latin coaches which we also don’t have. When we did have them, they still struggled with the physicality required in the PL.IMO Spain produces the best creative midfielders in the game. I've wondered often why we haven't had more Spanish players in the squad?
I forgot who it was that said the English midfielders regard tackling as a key skill. In Spain it’s a last resort.