That doesn't mean that the purpose of Bitcoin was to be an arbitrary data storage medium. And just because something is valid does not mean it was intended, nor that it is good (for the health of the network).
Discussion
Censorship is not good for Bitcoin either.
Whatever you and I think about a valid transaction is completely irrelevant.
It's not censorship if it's not mandated. Optionality is not censorship. Individuals choosing not to relay or mine certain transactions isn't censorship.
You show me one UTXO moving from one public address to another? All good, I don't care where it's from or where it's going. Show me a monkey JPEG on chain? I'm not relaying or mining that.