English or Turkish Education?

In Turkey, there are a lot of university which teach in English. Even one of them is METU. But is it true to educate people in English instead of Turkish in Turkey? I don't think so. Because education with native language is better. People can understand their mother-tangue more easily. To educate a person in English, his/her English must be perfect. But for a lot of people it is imposible. For example, a doctor studied in English at university but now he is working in Turkey. How can we expect him to be very succesful in a country whose language is not the language he was educated in? Of course we cannot. Altough he is very succesful, he cannot work effectively with Turkish. Ok, it is not suitable for some jobs such as doctors. But it is necessary for us namely for students who will be a teacher of English in the future. But only for us. Moreover people can live culture conflict because of English education. Because studying in a foreign language can make people impress from that country culture. Because they can start to think like an English. So they can became away from Turkish culture. In fact this is because of people who don't know their own culture. But of course studying in a foreign language is also an important reason. And also learning English is necessary but there are a lot of ways to learn it. For example there can be an extra English lessons. But for other lesssons, educaion must be in Turkish.