Look if someone doesn't like it they can run v0.13.0 of bitcoin core and have the witness data removed. I dunno this whole convo just seems like a gotcha for Knots because "something-something arbitrary data."
You know what they are trying to do. You know why a miner's arbitrary data is more valuable than someone broadcasting their transaction. I would like to stick to more substantive conversations like removing the OP_RETURN field from standardness.