I don't think that the attack vector is miners refusing to process different L1 transactions. I think the attack vector is different.

there's a perverted vision for bitcoin where creating a L1 transaction is as difficult as dispatching an oil tanker. it will only be performed by financial institutions and it will be very expensive. they will open lightning channels and 99% of the bitcoin users will not be able to afford anything besides interacting with custodial lighting wallets operated by large banks. once custodians are in control of 99% of the user interactions, they can impose financial censorship very easily.

permissionlessness and censorship resistance can only be preserved by making self-custody more scalable. this means that pairing excessively small blocks with the lightning network is not good enough. I can either pray for bitcoin to have a consensus change to make self-custody more scalable, or I can use the altcoins that bitcoin thus far has failed to make redundant.