Eh, I think you're overstating things as well. When two things are compared, they do not have to be alike in all respects — merely those relevant to the comparison. Put another way: Contrary to the title, comparing is not identifying.
For example, something with many layers might be compared to an onion or a matryoshka doll, but that doesn't mean it's edible or that it's made out of wood.
No, that doesn't work when you're comparing something to a tragedy. You can't ignore the seriousness of the matter without it being a statement all in its own. The kind of comparison made in the post is hyperbole.
For example, something with many layers might be compared to an onion or a matryoshka doll, but that doesn't mean it's edible or that it's made out of wood.