Economically speaking you are right market will decide,

but this is a specific target because not all txn use op return.

And op return does nothing in terms of oridinal /inscriptions that he doesn’t like therefore imo this is a specific beef Luke has with certain implementation of coinjoin which requires a specific txn which is called tx0(transaction zero)

Without tx0 one cannot enter coinjoin(whirlpool try call it) and tx0 uses op_return which I described in the previous reply