I use dwm, but it is similar. It has a master area and a stack. The windows "snap" functionality is in several DE now, including gnome. The difference in tiling wm is that 1) it is far more flexible than just one window left and one window right 2) it doesnt take an extra keyboard shortcut, it organizes them automatically.
I would say flip the question around: if I can automatically tile windows, why would I use gnome where I have to do it manually?
Actually, I found this pretty useful. I have to use "graphical" programs (browser, IDE, email client) rather than terminal based ones. And the graphical ones seem to assume that their windows are pretty large.
Let's say I start my server in my IDE and I use my browser to interact with it. Then the bottom right of the IDE (where the console output of the server is) will be visible even with the browser in focus, and so I can see what the log output is doing.
I have got keyboard shortcuts that move windows to predefined positions with predefined sizes. E.g. full height but only the right 85% of the screen. Or full width but only 90% of the height.
I would say flip the question around: if I can automatically tile windows, why would I use gnome where I have to do it manually?