Does AliExpress only sell knockoffs?

I've heard some rumors that AliExpress is a platform where only knockoff products are sold. Is this really the case? Are there any legitimate, high-quality products available on AliExpress as well? I'm interested in finding out more about the authenticity and quality of the products offered on this platform before making any purchases. Additionally, are there any measures in place to protect consumers from purchasing counterfeit goods?