In the particular case the missile was used after visual identification [1].

> The two F-15s now initiated a visual identification (VID) pass of the contact.

> Wickson's VID pass was conducted at a speed of about 450 knots (520 mph; 830 km/h), 500 feet (150 m) above and 1,000 feet (300 m) to the left of the helicopters.

Now I am not saying there is no room for BVR, ofcourse there is. The 2 tracks in formation coming from Russian airspace pinging you with their Russian military radars are definitely Russian fighters. But there are also a lot of times where there has to be a visual id.

A military jet with it's radars turned off is almost impossible to tell apart from a civilian jet based on radar data alone, and everyone errs on the side of caution, of course the side of caution occasionally is to fire first and id later[2][3].

[1] https://en.wikipedia.org/wiki/1994_Black_Hawk_shootdown_inci... [2] https://en.wikipedia.org/wiki/Iran_Air_Flight_655 [3] https://en.wikipedia.org/wiki/List_of_airliner_shootdown_inc...

> A military jet with it's radars turned off is almost impossible to tell apart from a civilian jet based on radar data alone The F35 can identify the type (and multiple times the model) of a specific aircraft in passive mode. Forget in active radar mode.

You are right that regardless of the reasons for phasing out AIM-7, there are reasons to take a look at your target before firing at it. I suppose I was only thinking about "hot war" scenarios, not police actions in civilian airspace.