I share your concerns but there is nothing more that can be done.
Let's assume that the TF-6000 project fails. In this case, we will almost certainly know that the TF-35000 project will also fail. Rather than embarking on a path that is certain to fail, alternative paths with a higher chance of success will be sought.
Also remember, the TF-35000 engine will simply be a scaled-up version of the TF-10000 engine, i.e. the TF-6000 engine with afterburner. Their designs will be very similar to each other. From this perspective, the time spent working on the TF-6000 is not a waste of time.
I also criticize the AKP Government for its adventurous Ihvan policy or the Altay Project, or etc etc. But I think they were surprisingly rational about the engine(s)! LOL