It makes me imagine a scenario where Erivo does no musical numbers, has no schtick and cracks zero jokes. She's glamorous, dignified and serious, almost solemn, for the entire show. And the needle moves zero percent one way or another, neither gaining nor losing viewers for it.
At that point, what happens? If you suddenly don't have to be funny and gregarious to host the award show, does that ruin the show for the people at home? Or does it make everyone say "oh my god, all these years we were working our butts off for nothing?"