A very common euphemism goes something like “life isn’t beautiful without the pain”.
And while there is some truth in the sentiment that it is “hard to know the good without the bad”, I find this type of thinking to be hogwash.
Suicide proves it, right?
Suicide is probably not the most painful experience known to man, but no one argues that it is pleasant. There is real pain there. So having been to that dark place would make you appreciate the good times more, right? At least, according to this axiom. But that is practically never the case.