Brent Ozar differentiates page splits:
You’re looking at page split numbers in a monitoring tool or Perfmon, and you’ve heard that page splits are bad, so you’re lowering fill factor, expecting your page splits to go down.
You’re monitoring the wrong number.
Jeff Moden has a good comment in there as well that what Brent’s saying is often true, but there can be edge cases. Though that’s part of the point: it’s an edge case, not a primary case. And I like Erik Darling’s comment on the post as well, as it’s often fretting about the color of the furniture when the house is burning down.