Many years ago someone told me something that I flatly refused to accept. And I still don't accept it now, despite all the times I've seen it proved right.
"The common good and the individual good rarely coincide..."
Sure, I know, it's true.
But some truths are probably worse than lies.
The only ethical principle which has made science possible is that the truth shall be told all the time. If we do not penalize false statements made in error, we open up the way for false statements by intention. And a false statement of fact, made deliberately, is the most serious crime a scientist can commit.
On the whole, lying is a cheerful affair. Embellishments are intended to give pleasure. People long to tell you what they imagine you want to hear. They want to amuse you; they want to amuse themselves; they want to show you a good time. This is beyond hospitality. This is art.