This seems to be the most popular assumption so far although it sounds wrong. As I've said before this type of attack (unlike the previous forms) creates an incentive to spam so the attackers may not care about the cost while regular users sending bitcoin around do. That incentive is the scam market that is being built around the Ordinals Attack.
This is about your 60th post where you've incorrectly referred to ordinals as an "attack." You're nearly as bad as franky1 in that regard except the difference is you get paid to post b.s. and he does it out of his own free will.
The word "attack" infers that someone or some entity is attempting to do harm to something. As a noun it is defined as an "aggressive and violent action", except the thing is it hasn't interrupted Bitcoin in the slightest. Bitcoin continues to do its own thing just fine. It doesn't give a shit what you think about how it should or shouldn't be used, BTW.
Basically its as simple as inscribers are utilizing Bitcoin in a way that you disapprove of so you're labeling it an "attack" out of butt hurtness. The sad thing is you'll never get over it so long as there is financial incentive for you to not (aka continuing to lie about it being an "attack").