There’s perfect rationale.
When it’s getting dark or even when it’s total dark it’s easier to see a white rod. That’s a fact.
Now if you are a Ron Popeil fisherman (SET IT AND FORGET IT) then it doesn’t matter being able to see your rod, not only that but there’s a chance you might be using the pocket fisherman anyways.
Myself, I prefer to be able to see it so I can decipher what is going on down at the business end.