Again, you’re reading things into my comment that I specifically avoided saying. If perfect, good and mediocre can’t exist, then obviously what I said isn’t applicable, and you shouldn’t be applying it in that context. It’s just like you wouldn’t reply to a post about it being necessary to outlaw the slavery of elves by saying elves are fictional and the author is demonstrating that they’ve not considered this.
This segues nicely into my original point - if you try applying adages to situations they’re unsuitable for, dumb things will happen.