There is no logic in developing a manned platform out of an unmanned platform. Within the next few years, AI will completely eliminate the need for a pilot. For KE, a pilot would be a limitation to perform aggressive maneuvers.
That being said, there will be a period were manned and unmanned platforms co-exist. In this case it will be KAAN who commands a fleet of KE and ANKA 3/4
There is actually. You want to save development cost, time and re-use capabilities that are already developed and tested. You also want commonality of systems to reduce manufacturing costs.
Also, saying that "in a few years" AI will "completely" replace the need for a pilot is a claim with very little evidence to back it up. Let's first see a combat aircraft that is capable of being operated by an onboard AI, under all flight conditions, and which will not require a remote operator. When such an aircraft is in service with any airforce in the world, then i would be inclined to accept your claim.
But right now, all these "onboard AI" systems are experimental programs. We don't know if they will completely replace the need for a pilot.
This is why the future NGAD, GCAP and FCAS are all being developed as "optionally manned" platforms.