She should absolutely run. I don’t know if she should win the nomination, but running brings a voice to the wing of the party she represents.
Primaries are about coalition building. And to have your ideas represented by the eventual candidate you need a champion to promote them in the process.
Losing the nomination would not be the end for AOC. But as a champion for the “Democratic Socialist” wind of the Democrats there’s really not a better candidate to speak at the primaries and ensure that even in a primary loss the eventual winner adds parts their goals to the administrations goals.
This is why the “Christian Conservatives” always run a few candidates in the Republican party, and why they’ve always got a spot in the Republican party platform.