There's two separate issues at hand. One is the reality of what the vessel was doing. The other is the legality of the action taken.
Because many don't feel the shot was legal (with good reason) or just don't like the administration, they're turning the reality of what the vessel was doing into a political weapon. It's important to understand and differentiate the two in this case, especially here in AW as a group of individuals who are educated in the specifics of ROE thanks to their professions.
Assuming there was an asset available, that vessel would have been fired on under normal circumstances if it didn't stop. There's zero question in mind that would have happened. Everything about that configuration indicates it meets the ROE for AUF. The important thing to know/be aware of is that the shots wouldn't have been at the people. I know you guys understand that, but just reiterating the point.
As an aside, it is relevant to mention that people do get injured even when conducting AUF. Bullets can do interesting things.