Can't have it both ways. You if declare other peoples' use cases as spam and decide to ban them, then you are absolutely dictating what they can and cannot do.

The protocol is for peer to peer electronic cash. Centralized exchanges are not peer to peer, ergo they are a misuse of the protocol as well and should be banned.

I'm obviously being facetious here to make a point, but the point is that anyone can argue that anyone else's use case is spam. What makes your claim that ordinals are spam objective truth which must be acted upon, while anyone else's claim that something else is spam subjective opinion which must be ignored?