yes I know that. I have a few videos showing dogfights like that. But there are other reasons behind it:
1)1VS1 is usualy within visual range, judging from the footage that is released to the public WVR combat is the one being simulated the most.
2) No pilots like or can afford to keep the fighter at speeds high enough for extreme G's. If its going to be a knife fight they dont need supersonic speed to launch BVR missiles or dodge themselves while trying to do the same.
3)And because its impossible to simulate BVR fights in real life training because there wont be anything fired in the air for the pilot to see, get warning from, and dodge.
4)Actual BVR missile duels at war were extremely rare.
Despite this, combat doctrine as well as online experience favours that its advantageous to begin the fight at high speeds or else risk being easely caught in the no escape zone of BVR missiles wich, now are the most used weapons on loadout free servers. With Blackouts such as this its then VERY VERY hard to even change direction once fired upon during such engagements. (even more with the reduced warning times we get in 1.1)
Each virtual pilot then needs to log on G's such as seen in the video I showed you.
No it wouldnt be a confortable thing to do, but IMHO it could be donne.
My final thoughts are the recolection of the times I needed to do these manuvers in 1.1 and the pilot becomes fatigued in seconds. In comparison the the pilot in the video, this one is superhuman!