The SU-37 fighters cost us about $67 million each including missiles and enough spare parts to last us for their normal operational lives. The interceptor UAVs had better cost less than half as much. On our home ground we supplement our fighters with SAMs. The Interceptor UAVs, at a minimum, would give us the ability to project that a bit. In a dogfight, the ability to pull a 12 or 15 g turn could make up for not having a pilot on board. I realize this has not been done yet. If it were easy, it would have. But it seems technologically feasible.
Besides, it doesn't have to be pure man versus machine. We can use them with our fighters, like a chess master using a pawn in a gambit, to get an advantage, attack with an interceptor UAV to force the enemy plane to react, which leaves it exposed to our manned fighters.