I think it is for the "good actors" who would rather build a protocol that is sustainable and uses something fit for purpose than to hack a solution with negative effects for users.

And to be clear, I am not pro or against this change, since it is not a consensus change, if I see negative externalities that don't look to disappear naturally, then I will switch to a client that adopts filters and encourage others to do so also. It'll certainly be an easier sell at that point in time.