Data is just data is a naively shit argument. A jpeg of some abused child is not the same as a UTXO. My bitcoin node is for keeping my personal copy of all past bitcoin transactions because it benefits me, it is not for keeping copies of your jpegs (disgusting or not) because you we're able to incentivise a miner. I don't profit from storing your photo collection on my computer, I don't care how much you want to pay a miner to put non bitcoin transaction data on the blockchsin, I'm not going to help you do it. Why is this a hard concept?