tbh, it's not exclusive to you, it has surfaced here over and over during the last 2+ years, which is a strange phenomenon, IMO.
If I had to guess, I actually think it's the other way around, tbh, a known foe you defeated once is a measurable target, it gives you a certain degree of certainty. For example, you already know she's heavily unliked, even from factions within the Dem party.
Anyways, not sold bloomberg is going to win the nomination, but in the event he does, I fully expect him to pick somebody that claims to be trending to the left side (ie: Steyer, even Warren, etc). He's the center-right candidate already, he probably want to pry some votes from the more obstinate BernieBros, etc.