they are increasing the non money use case and would ultimately force a raise in the block size and diminish the pool of users who can run nodes. it can't be global money if half the blocks are filled with spam.

the chain is spammed primarily because of segwit, and people could incentivize upgrading to taproot, which is both smaller and cost is not a lot greater. smart contracts should stay off chain, and have a benefit in that they can be done on private consortium networks to enable user privacy (this is not possible with public SC blockchain systems).

segwit is the bigger problem. OP_RETURN is going to then become more important if you nudge people onto taproot, so continuing to filter them is important.