Technically you are right. But it is not a requirement. I would rate stealth many times higher than Supercruise and in that respect we should have gone for the F-35 instead. But that is not how the world works.
Btw, supercruise utilizes more fuel than subsonic flight. Supercruise is somewhere between subsonic and supersonic flight in fuel consumption.
As for AB users being unable to return, that depends on the mission. Realistically, if the EF is required to supercruise, then with it's crappy fuel load of 5 tons, the EF won't even manage a 300Km combat radius. Let's just say for a CAP mission the EF won't fly with 100% fuel. So, 50-60% is most realistic. That effectively halves it's combat radius of 800-1000Km to 400-500Km. Now this is only in the subsonic regime. Bring in supercruise and the combat radius is effectively less than 300Km, maybe 200Km. Now do you see why supercruise is not a requirement on small and medium fighters. The F-16 cannot supercruise because the requirement does not exist. Similarly the Mig-29 also has no requirement to supercruise. EF and Rafale fall in the same category.
MKI, Eagle, Raptor and PAKFA are in the heavy category with massive loads of fuel. Supercruise on them is a requirement.
If the EF is required to kill another aircraft then the EF is going to intercept at full AB, not at crappy supercruise speeds of Mach 1.2. If the EF is required to perform CAP, then that will happen at subsonic speeds. If the EF is required to kill something on the ground, that again will be at subsonic speeds because of the extra payload. So, supercruise is an unnecessary requirement. Basically, it is useless.
If you think supercruise is awesome on EF or Rafale because the manufacturers say so then your premise is deeply flawed. Neither fighter has the range or flight time to manage it. The F-16 is better suited for supercruise, with it's larger fuel load and single engine, but it does not have it.
Again. No. Supercruise is a requirement on aircraft which specifically state the same. Concorde is supercruise capable. EF, Su-35 and Rafale have done it in tests. The F-16 achieved the same in the 80s during tests. Nothing to indicate it is part of the requirement now.
Only F-22 and PAKFA are supercruise capable because the fuel load and internal payload(missiles or bombs) allow the aircraft to benefit, aerodynamically as well as operationally, it's design to the maximum.
MKI can sustain a 9G maneuver. But the maneuver kills the pilots health. A pilot may be able to sustain ejection perhaps once in his entire life. There are major constraints to what a human can do. High altitude flying isn't easy.
