The constant statements that the slide lock/slide release wasn't designed as a slide release are so ridiculous as to be almost comical, if people weren't so serious.
Look on this controversial little lever. You will note serrations on the top portion of said lever...Such that might help one to push down, thus RELEASING the slide.
As I have said several times. This lever releases the slide if it was locked to the rear. It can be tough at first but will work in. In addition, it just so happens to be located in the same place and performs the same function as the slide release John Browning designed into the 1911 which is, without a doubt, designed to be pushed down to release the slide.
A car manufacturer can call the gas pedal a foot-articulated acceleration facilitation device, but it's a frigin' gas pedal.
I know there is contention as to whether the slide lock/slide release should be used to release the slide, but imagine for a moment, that you have been shot in your support arm and have lost it's use, as happened to one of my partners in a shooting. Yes, you could try to find something to hook the rear sight or ejection port to rack the slide. You could pay money or modify the gun to make this easier...While you are bleeding and hurting... Or you could press a little ambidextrous lever that has been conveniently placed on two sides of the gun because the manufacturer thought it important enough to provide to lefties (or people shot in their right arm as well) for their use as well.
The statement that the lever was never designed to release the slide is wrong. Plain...Simple...Wrong.