A random Belgian here
I think it would be very pity if Chelsea don't let Courtois play if Athletico can't pay £6 million, which they can't since they are in money trouble.
They would not give Courtois the chance to play in one of the high points of his career so far, which seems rather childish.
Would you rather want to win the champions league if it would be against all decimated teams or against the best in the world at their peak?
If you are only interested in money and yourself then you might only want to play weak teams.
As a belgian I start to hate how Chelsea treats their players (Lukaku, KDB, Courtois).