Hate to burst your bubble but, in the real business world not a lot of time is spent on what could have been done, what should have been and what one would have done if....
People in my world do NOT want to hear BS that essentially rehashes the past for a very simple reason- the past is the past and none of us can go back in time and revise what has taken place. You can PRETEND to do so and that you would have done something better etc. but - again - where I come from your comments would be dismissed before you were finished babbling.
"Hindsight is 20/20" Ever hear of it?