Unfair Toyota Service Fee

I own a 2020 1.6 lt Toyota Corolla and today I called Toyota Borovalı in Bornova, İzmir, to ask about the cost of fixing a problem with my car. They told me that I first needed to bring the car in for analysis, which I find normal and acceptable. During the call they clearly stated that if no problem was found, I could leave without paying anything. However, they added that if they detect a problem and I decide not to have the repair done at their service, I would have to pay ₺10,000 just for the diagnosis. When I asked what I would pay if I accepted to have the repair done there, they told me I would only pay the repair cost itself, with no extra fee for the diagnosis. This practice seems extremely illogical and unfair to me. If there is no problem, there is no need to go to the service in the first place, and if their repair price is not acceptable to me, I do not understand why I should have to pay such a high amount simply because I choose not to proceed with them. I am disappointed that a global brand like Toyota and its authorized service could adopt such a policy. I request a clear explanation of this ₺10,000 fee, information on whether this policy is officially approved by Toyota, and the cancellation of such an unfair practice so that customers are not forced to accept repairs against their will.