Lets ban redundant computation. I see all these inefficiencies in everyday software engineering: container isolation spends unnecessary resources, hundreds of thousands of Wordpress sites run on their own servers instead of a single big Wordpress multi-site, HN and reddit are more or less the same so deleting the other would relieve unnecessary load somewhere.

I think regardless of the application, it is important to allow everyone to choose their own level redundancy. Crypto is bad for the environment because of blockchain's redundancy. Banning an application because of its redundancy sounds absurd to me.