There's always an exception. In one of my chapters, the dialogue happens in a dark room. Therefore, emotion and nuance can not be shown in body language. While I had to convey most of the feelings in the actual words that were spoken, I needed a dialogue tag that would demonstrate the physical way the dialogue was delivered.
And that's the second part of the rule. If the tag indicates how the speaker is speaking, then it can be used (SPARINGLY).
Here's a list of dialogue tags that convey physical properties of how dialogue was delivered.
Alternatives to said
But you should probably use said.