We know this. But such restrictions are made as a last resort. Afterwards, normalization becomes late and difficult. We know this from the 1974 Cyprus operation.What makes you think the F-35 has a "backdoor"? There's no hard evidence about it, only conspiracy theory... As you say, aren't you afraid of stopping the supply of components to the F-16 because of the upcoming Syrian and Iraqi operations? What about the parts supply disruption to the E-737? Why the hell are they using American weapons? Why don't you know that stopping parts and diplomatic pressure are more effective than installing large-capacity software such as backdoor?
In addition, if you are supplying mutually with a country on the same subject, applying such an embargo will harm your country.
There are military materials, maintenance and repair processes in the USA that it procured from Turkey. It is risky to implement the embargo you mentioned. In addition, there are various logistics, operational convenience and opportunities that Turkey provides to the USA.
It would be risky to give up on them. As a result of the applications they made to our country after the purchase of the S400, the efficiency of the usa and the EU in our region dropped.
In other words, the policy you say cannot be implemented without breaking the relations.
Well, as you said, if there is no back door in the f35 system, why did European users have to pay money and develop a new logistics support system?