Who says they are mutually exclusive? It's arguable that our two most successful recent seasons have been accompanied by our two best recent cup runs.
Maybe a good team in the league, can be a good team in the cup, and vice versa. And performances in both feed off each other.
I would like to see us win the fa cup in my lifetime. Genuinely don't give a fuck about playing in Europe. I care about results against teams that I know, that we have rivalries with, that we play regularly, now as well as historically.