You are abolutely wrong on it being “unique”. All of those pundits on all of those channels are all news contributors to the networks they appear on and somewhere along the line have given speeches at political party partisan events while some are actually holding a seat in public office.
Your analysis is even more fundamentally flawed in that this speech is being given to a group, that by law (tax status), cannot endorse one party over another.
Most pundits in the media aren’t likely to be candidates for president. So let’s see how she handles this opportunity
if it is broadcast.