When I learned caligraphy, it was emphatic that you always draw the nib down or across. I followed that rule. Trying to pull a wide nibbed pen upwards just ruins the nib.
Put another way, for caligraphy, you need to remove your nib from the paper many, many times. Whereas with a rollerball, ball point, marker, or pencil you can do cursive where the writing device never leaves the paper. The former takes an eternity to complete, but looks beautiful. The latter looks only as good as your penmanship (mine looks like barf).
So I'm not understanding how I can take a nibbed fountain pen and not destroy it trying to drag it all over the page, splitting the nib in seconds?