He didn't Say you can't forget to set flap, he said there is no excuse, and he's right. Actually....I can think of one excuse, if you joined a rubbish airline that paid lip service to training and safety when you were 19 years old, and continued through to a command in an airline devoid of any decent safety culture, and then forgot to set the flaps, I would say it is your management teams fault for not wearing the cost of decent training.