Can you make xterm windows exactly 80 characters wide with a tiling window manager? How is it going to even tile that way? Or when making say an icon you want

Can you make xterm windows exactly 80 characters wide with a tiling window manager? How is it going to even tile that way? Or when making say an icon you want to see it 1:1 size while working in zoomed in size, how tiling solves that? If all of this is problematic, I don't see how tiling window managers can get into mainstream.