Would it be accurate to say that self-report inventories are a better choice than projective tests in assessing personalities? why or why not? psychology

No. The self administered tests are much less likely to be accurate. While it may seem you are the best person t describe yourself, your view is extremely subjective. It is best to have a professional in the psychological field to asses you because they have both an objective view and have been trained to identify personality traits you yourself may not have noticed.