This isn't a "click", it's a double "touch-pad tap (no depress of the button)"
I've gotten so used to tap interaction, as opposed to "clicking", that I could easily work with a Mac now that had no "click".
I don't use the double-tap interaction (interferes with some games, and sometimes you get a deselect if you've multi-selected things on the screen) - but the three finger drag is wonderful.
[Edit: One exception - on bootup, before the OS is running, it won't recognize tap commands, and you have to click]
Holy crap, it's in accessibility! How I cursed apple when I could not find it after upgrading. But now I already accustomed to "3-finger drag".