So who are They? Do They actually exist? Or are They just made up to make us feel better about falling short on something and we say it's "...[ok], They always say."
"Well, They always say, hindsight is 20/20" Well of course it is! DUH! In hindsight (after the fact) you see what happened and how you could have done better or different. OY!
Ah, well... They say, this too shall pass......