Nations have invested a lot of effort and cash in developing BVR weapons; the current generation (some in development) have capabiities way beyond visual range. Tactics used in training are (and have been for a long time) heavily focussed on employing the first, long range, high energy kill. However, when it comes to ops the ROE do not always support the use of that capability.
The technical capability massively exceeds the political courage to employ our hardware and our training fully. Not helped when EID methods fall short (Tornado/Patriot engagement). That is why we MUST still maintain close range weapons and the skills to employ them.
Why else do folks try to keep getting rid of the gun in fighters only to find it a necessity? "When was the last time we shot down an aircraft with a gun" Heard it asked too often. Bring on BVRAAM and then deny the guys the ability to employ it.