Agree. Simple fact: winning the Europa League while losing La Liga to Real Madrid will be a losing season. Winning La Liga while losing the Europa League at the very early stage (at 1/16 lol) will be a triumph. The priorities are obvious, I even think Xavi would be happy if Barcelona lost to United and he could fully concentrate on La Liga, but of course the circumstances (status) will not allow him to lose this confrontation on purpose.
yes, of course, no team deliberately gives victory to their opponents if they also have the ambition to win.
Xavi won't just think La Liga is everything. because after being eliminated in the Champions League, maybe Xavi's focus is La Liga, not the European League anymore.
but there is still the Copa Del Rey and the Spanish Super Cup, they also have to show the quality of their game. maybe some coaches will complain about the tight competition schedule in Europe, but this is what happened. all teams must have a good focus in every game.