Unfortunately you are a little naive then.
The top 4 is vital for the extra revenue, especailly with tighter FFP rules starting. We have a sponsorship deal with Adidas that HALVES in money if we don't make the CL. It's the competition that deems whether you're a big club in the modern era.
All the big name players want to play in the CL, and most important escaping the Europa league fixtures that travel you to places like Azerbaijan, Kazakhstan etc.
Not to mention the silly Thursday / Sunday loop we get stuck in also.
Winning a Europa league title didn't do anything for Jose Mourinho, and it won't do much for us now. Stopping ourselves from YO-YOing in and out of the top 4 is 100% more vital for many reasons.