why Frodo?

[Eldar14]

I wasn't saying that Sam would have taken the quest and failed because of lack of inspiration. I'm saying that that's why Sam would never volunteer for the quest. Sam feared for ME's fate, but he realised that everyone else at the council did also, and that someone else would volunteer if he didn't. But Frodo had to volunteer for his own sake.

I think that either Frodo or Sam could have actually succesfully completed the quest, but only Frodo had sufficient reason to volunteer.