It isn't. https://www.organicauthority.com/eco-chic-table/carrots-vs-parsnips-whats-differenceAre parsnips "white carrots"? How is the fiber difference between carrots and parsnips?
I was going to pm haidut to ask if white carrot's fiber has the same benefits, but it would be better publicly, so everyone can read. @haidut Can you let us know?
Or perhaps Ray Peat.