[Ericson2314]

I'm curious but not sure exactly what you mean?

Practically I think moral high ground is an effective, if difficult to world, way to shut down whataboutism, but philosophically it is weak.

[seanmcdirmid]

To say X has the moral high ground or X does not have the moral high ground is a variant of "argument from authority" and it's opposite as an ad hominem. It doesn't have any bearing what so ever on the issue at hand.