Safety precaution, that is all.
That's exactly why people should be warned of the possibilities and recommended to not use what has been "proven" to mostly likely cause bans.
I doubt anyone is against taking safety precautions. But like I said, if you look at everything objectively, then nothing is safe. We need some degree of subjectivity. That's why we can say that aside from using a retail cartridge or playing offline, using a CIA or a private header is the safer you can be.