You’re right in principle, but the TF-35000 engine is still too expensive—it’s not a disposable product.You can make your Hürjet optionally manned. If the mission is more like bombing certain targets your unmanned Hürjet can do that very well but if the mission requires decision making or management of drones in a fleet then you can fly manned.
In any case you have the engine to make the plane that will fill a role. It will be wasteful not to make it as you have already gone through the effort of making the plane by having made the engine ready and having the experience of making fighters before.
It makes no sense to install it in a single-jet configuration on a platform, whether operated as a hybrid (manned/unmanned) or fully unmanned.
In my opinion, the Hürjet should never have been designed with F-404 engines.
Instead, it should have been equipped with 2x AI322F engines from Ivchenko Progress, which would be replaced by 2x TF 10000 engines.
You would have had more thrust with 2x AI 322F -> 19,000 lbf instead of 17,600 lbf as with the F-404 engine, and with two engines, you would have had redundancy as a naval platform.
One could even have tuned the TF-10000 engines to 12,000–13,000 lbf, which would have provided 24,000 or 26,000 lbf for the Hürjet—effectively creating an Aircraft that falls between a Gripen E and an F-18 Hornet (not the Super Version).
That would have been 100% sufficient for Turkey as a training and Highend LCA platform like Gripen; we wouldn’t need either new Eurofighter or new F-16s.
With a delta-canard configuration and a clean design using composite materials, titanium…. supersonic speeds would even be possible without afterburners.