I remember an army major many years ago - he was quite surprised when I suggested that he had a really easy job if he could play golf every day. He told me something I will always remember - "Trouble with you air force types is that you are always so busy. If we go to war how will you find the time? - all I'll have to do is give up golf"!
If LEAN means giving up golf then we won't have time to fight a war.