This kind of Apple snobbery is very unhelpful, sorry. Sometimes Apple does things better, sure. But what I'm saying, and I believe most people here would agree, is that it is simply easier and faster if clicking once on a dock item maximizes/shows the app/window, and clicking it again minimizes/hides it.
If you want to briefly glance at another window/app while working on something and then quickly switch back to whatever you were in before, this is simply much faster and more efficient than having to long click or double click, and then clicking again to hide, or moving the mouse all the way from the bottom of the screen to the top to double click the title bar of the window (especially with browsers with a lot of tabs open, even that can go wrong).
Instead of defending something inferior based on the assumption that it must be better because Apple made it, it is better to acknowledge those instances where Windows does it better and improve. The same goes the other way around, if Windows improves on the things that Apple does better, all of us consumers win.