I mean, honestly, what do we have to lose? As long as he runs as a Democrat and isn’t the equivalent of a drooling idiot on policy or a crazy conspiracy theorist like Woody Harrelson, I don’t see the harm in running him. If he’s hopelessly unable to navigate taking issue positions, he won’t win the nomination.
Abbot is probably winning anyway and if nothing else, you might get lucky and shake up the dynamics of the race a bit and drive up turnout in the Austin metro win or lose and the latter can only be a good thing.