I don't think it makes sense, but I've heard Steve Lee make a similar argument about defaults around some of the quadratic hashing type transactions. That there need to be defaults that don't accept such transactions so that miners won't build blocks with them.

You may be thinking of the new policy Bitcoin Core v30 introduced to restrict the number of signature operations permitted in legacy script. The idea here is to discourage at the policy level in advance of BIP54 introducing a consensus rule that elevates the same limit to a consensus rule.