Cem / Argent,
I think there's much more to it. When Rock tells his story about the man (who is almost certainly Hoid, given the description and Sigzil's reaction) coming out of the water in the Horneater peaks, he says the following:
“No, of course not. Lunu’anaki cannot hurt man. Is forbidden by other gods. Everyone knows this.”
Sanderson, Brandon (2014-03-04). Words of Radiance (Stormlight Archive, The) (p. 541). Tom Doherty Associates. Kindle Edition.