Qiraat Of Prophet SAW And Lehja
Yes you are right. We are not obliged to utter the sound of Daad or Zaad as the Arabs do. We have our own sound of ض ذ for Arabic. This is Qirat. Of course from the prophet came both qirat along with accent. But we are obliged to read Quran, with or without Arabian accent.
Uttering the sounds of the words as the Arabs do is accent. Qirat can be done without a particular accent.