Because Linux is modular. On Windows, the desktop shell is welded to the kernel. On macOS, it's proprietary and rigid. But on Linux, the is just another program you can swap out.
You can keep Ubuntu, Fedora, or Arch, but replace the window manager with a tiling engine. Or, you can install a standalone distribution built entirely around tiling. window tiling linux
KDE Plasma users can install scripts like Bismuth to turn their desktop into a tiling powerhouse. 3. Manual Tiling (The "Standard" Way) Because Linux is modular