I think the problem for some of us is the “in theory” part. No NBA team has had two shortish guards where one of them isn’t a plus defender. Toronto was probably the closest ever, but there are many more examples where the short guard didn’t work.
Now, I do agree that the 3-focused NBA is a different beast than in the past. But, I would still like to have a 2 that contributed more on the defensive end when his shot wasn’t falling.
I think it is clear that for Dame and CJ to work, the rest of the team must be plus defenders.