The biggest problem with right turns are:

1. Free rights a uncontrolled right turns that don’t protect crossing cyclists and pedestrians through time based segregation. 2. No physical/grade segregation. Cyclists become invisible in blind spots during right turns because intersections are terribly designed to support anything other than cars. A well designed intersection puts cyclists in front of cars where they are visible at all times, instead of in a blind spot.

https://bicycledutch.wordpress.com/2018/02/20/a-common-urban...