Yeah, definitely a matter of workflow and personal preference. Nobody wants to convert anyone else, you just ask why people use tiling WM, and people are answering.

why tile windows at all

I can answer that pretty comfortably. There are two main reasons, the first is that it’s very common to have to look at two things at once. If I’m taking notes while reading something complicated, or writing some complex code while referencing the documentation, or tweaking CSS rules while looking at the page I’m working on, it’s just way too disruptive to constantly have to switch windows.

The second main reason (for me) is that a lot of the time, the content of a single window is too small to make use of the space on your monitor. In those cases, if I have something else I’m working on and it’s also small, I’ll tile them. It might be easy to toggle between windows with a hotkey, but it’s strictly easier to not have to toggle, and just move your eyes over. Peripheral vision means that you don’t entirely lose the context of either window. When you’re ready to switch back to the one you just left, you don’t have to touch anything, and you don’t have to wait for the window to render to visually locate where you left off.