That arguement has a flaw... Arsenal beat us at Emirates, Newcastle beat Arsenal at the same ground. But I can confidently say Newcastle are not better than us!
Regarding the latter comment that we cannot say Schalke are not the best team in Europe if they beat Utd and Barca/Madrid to become the Champions... Well they might get lucky you know! A wrong called penalty, an early red card an injury... You can't just exclude the luck factor, period
You keep on saying Lyon were better than Madrid last year... But weren't you a tapin away from beating them!? And then who did they face later? Not Chelsea, not Utd, and not Arsenal who all failed to reach the semi!! Can you just declare the semifinalists Lyon were better all those other teams!?
But one point I accept is, as you proceed further the competition the chance of just riding by luck keeps on reducing. You can't win it all just by luck, at the same time you can't win it all just by talent i.e., just by being the best team