@Rubang
K i have come up with another reason.If they tried it, the Nazgul, on their winged beast could easily destroy them(especially the witch king). According to the text, the Nazgul die when the ring is destroyed( except for the Witch King)
"The accumulated filth of all their sex and murders will foam up about their waist and all the whores and politicians will look up and shout "Save us!"...
....and I'll look down and whisper "no."
- Rorschach







