In my 36 years, I've never taken extraordinary means to vacate a runway to accomodate a following aircraft in rainy low visibility conditions. The safety of my operation comes before anything else. By the way... isn't that why god invented TCAS to govern distance for following aircraft.
I politely have the FO tell ATC to $hit in their hats when requested vacate the runway when I deem to be unsafe after configured for landing.
I've never subscribed to the "Blind Obedience" doctine.