"He was a good man...."

Why is it that we only say great things about people after they have died and not during their lifetime ? Why do we have that anguished sense of regret of having missed the opportunity to express real appreciation of another person’s company, their contribution and general presence ?

If we spent a fraction of the time and effort used to create an eloquent eulogy praising another (deceased) human being, to instead say that to their face - isn’t that sufficient reward just to see their smiling reaction to those words of praise ?

Some things I will never quite fathom, and let me say that I too am guilty of the above misdeamour.