I think people are missing the reasons here for using each.
If you compete, which I now do, most use the slide release to save time. There is nothing wrong with this.
However, where the slide release will fail you is in a combat situation. “Tap, Rack” is taught because once a lethal confrontation begins, all the physiological responses that your body goes into renders fine motor skills absolutely useless. You can think “this won’t happen to me” but it will. It’s happened to me 3 times in my career. Fine motor skills.... out the window. You can try to operate that slide lock lever.... you won’t even be able to feel it. It’s like you have large pieces of putty on the end of your arms. But, macro motor skills that you have trained into by repetition work. “Tap, rack”. I keep using it in competition because I’m no dreamer.... I’ll never be world class or even provincial at my age. But I don’t want to be confused the next time I REALLY need that slide to operate.
If you want to see or experience something similar, go physically exhaust yourself, and I mean bag ass exhausted, and then try to operate your pistol. Very similar. Sinatra’s “90’s dogma” is still current.