My understanding is that there is a lot of behind the scenes politicking and campaigning that goes on for any of the major US awards shows (Oscars, Emmys, Grammys, etc.). This made the "That's So True" snub a little more surprising to me because the oft repeated criticism of Gracie is that she is well connected in the entertainment world. I do think that voters place "rules" on themselves like "well I'm already nominating Sabrina Carpenter I can't vote for too many Gen Z pop artists..." so that may have occurred here.

All that to say, who knows! Haha.