I see your point and I agree, except that that isn’t what these headlines are saying. Granted, perhaps that’s just the standard issue of sensationalism and clickbait rather than being specific to this issue, but the point remains that while the articles may be as you claim, the headlines are still presented instead as “A chainsaw can’t even drive a simple nail into wood without issue and that’s why you should be angry anytime you hear a chainsaw.” I dunno. I’m just so exhausted.
Which is interesting, because the point of the phrase is to imply something is so commonplace that it practically has no value. It’s so commonplace you can get a dozen of them for a dime!
So technically while the relative value of the dime in this phrase decreases, the relative value of the phrase itself increases as the dime’s value ever further approaches negligible, ever better emphasizing the point!
Words are fun.