pistol combat grip - most get this wrong

Nir maman channel combat grip https://youtu.be/gY7cmZ39oLE breaking your right hand grip to accept a left thumb over a right thumb is extra steps and grip cant settle in quickly, also in close quaters combat having a right thumb up to piece the puzzle of the left hand and left thimb over right is taking more time and your strong single hand grip is compromised in a struggle like a gun grab or having to use your left hand to block or something else, most handguns the single grip can be used nest ny roght thumb clapping down on middle finger