When a Comma Isn’t Required Grammatically But Is Perfectly Legitimate Rhetorically

Here’s the sentence (from my Wikipedia white paper):

“To be reliable, a publication must have a reputation for two traits: Fact-checking, and accuracy.”

Should there be a comma between “fact-checking” and “accuracy”?

I can see both sides:

Yes, because you want the reader to pause between these two traits.

No, because there’s really no need to pause.

Language maven Paul Stregevsky answers as follows:

“This example is a textbook case where a comma is not required syntactically or grammatically but is perfectly legitimate rhetorically or semantically. Stylebooks are full of such examples.”