Where is the video?The simple fact is, 12g fighters can be built.
A major limiting factor of fighter aircraft design is the need to accommodate incompressible, low speed, flow for take-offs and landings.
If , instead, the aircraft is built in 2 pieces, the aircraft can be designed for entirely compressible flow; allowing the wings to have a lower aspect ratio. Fighter wings limiting design point is torsional stiffness, the lower profile ratio allows stiffness to be maintained by deepening the airfoil thickness and reducing the skin thickness. To sustain higher gloadings, the pilots would have to wear water filled suits. The second part of the aircraft would be a !ifting wing for take-offs and landings, which would separate in flight. It all may sound insane but the engineering works.
Minimally, test aircraft should have been built 50 years ago.
I can show the basic design if anybody is interested:
YouTube/drochmhada/The f-35 is useless. (1 short or 4 long videos)