Mourinho's point was using it continuously to defend a poor result, which he's right. It's small-time.
It comes to a point where when do we stop excusing poor results with 'we performed well, it just wasn't our day', to actually seeing positive signs of improvement? We can forgive Lampard to an extent as there is some progression, particularly with youth, but it's been mentioned quite a few times that it will lose its value quick if these errors we are seeing don't go away.