I can't see a practical world where the OS doesn't need to take control of window positioning in certain situations. As a core example, there is full screen. Minimize is another, but that doesn't have a clean analogue in the tiled universe.

There's a natural strong reaction folks have to window managers, because it forces you to mentally remap at such a foundational level.

I prefer tiled managers because the user offloads most responsibility. Open something and by default it uses as much space as is available. If you have a special need, you can float or resize, but the vast majority of cases it makes the right call.

At heart, it's offloading cognitive load. They're more predictable and require less faffing around.