Yes, it exists in all DJI drones. If you are in the DJI Fly App, it's under Safety and Advance Safety Settings. The feature is called "Emergency Propeller Stop." See attached photo. If it's in the DJI Fly App, you can bet it's in the DJI Go4 App as well. What you are saying is not meaningful. Nobody WANTS to use this feature. It's there for emergency use only, to protect other people from injury. Of course, if you are a psychopath, you wouldn't want to use the emergency stop even if it is about to injure someone. I have never needed it when I fly my DJI Mavic Air 2. However, I would have used it at least three times already on my Autel
Evo Lite Plus, which I have had only for a month now, because two out of three times when I install the propellers, they are not installed properly for no obvious reason. I just have to do the same thing over and over, and the propellers are finally installed correctly after one of out of three attempts. When the propellers are not properly installed, the drone goes out of control at take-off and it is quite dangerous. Fortunately, thus far, it has flipped over before it hoverd too high and then it stopped due to the crash. I don't want to be counting on this kind of luck each time and obviously have to figure out how the times that the props are installed properly are different from the times they aren't since I can't tell what I am doing differently, nor do the props look any different when installed correctly or incorrectly. And yes, I do match the props with white circles to the motors with white circles. Autel just copied how DJI has us installed props on Mavic drones, although Autel probably didn't design it as well.