Not a scientist nor native English speaker myself, so I’m wondering: shouldn’t that technically say „hypothesis + evidence“ instead of „theory + evidence“?
Which is of course nitpicky (if I’m even correct) in the context of a tumblr post, but I’m still curious
But the roots of words aren't what words mean in modern English. Otherwise, spirit would mean 'breath'. Logic doesn't mean "words" even though it came from logos. Besides all that, we're on "science" memes so it doesn't really matter what the term means outside of that world.