So rather than fix the problem we just give in to spammers? There is no reason to believe that out of band transactions will ever cost the same as legitimate transactions. Meanwhile we need to work aggressively to fix the miner centralisation problem. Making bitcoin a spam friendly space in the meantime will do enormous harm, not just in reducing decentralisation but in the public perception of bitcoin. You want institutional and nation state adoption and the number go up that goes with it? If bitcoin becomes a cesspool of spam and scams like ethereum or solana the chance of that goes down massively. If you want non-monetary transactions on bitcoin thats fine but don't also expect bitcoin to become the base layer of money worldwide.