I agree with you about the mathematical relations. I used to do it when I was younger, but it never quite worked out so I stopped.
However, there is sort of a reason to do it: baseline alignment. If you have columns with different contents, the heights of everything should work out so that the baselines continue to align over the page. You can adjust this manually, but a mathematical relation can be a shortcut there.
However, there is sort of a reason to do it: baseline alignment. If you have columns with different contents, the heights of everything should work out so that the baselines continue to align over the page. You can adjust this manually, but a mathematical relation can be a shortcut there.