I mean, if Emet-Selch really wanted to join hands and come up with another solution he could have, y'know. Made it clear he was testing the inherent worth of humanity by seeing if the WoL was capable of handling thier lightwarden snacks. Instead of the whole, kidnapping our friend, threatening the people we care about, and goading us into succumbing to corruption thing that he did do.

Also, I fail to see how one person's ability to withstand being corrupted by a bunch of corruptive aether has any bearing on the inherent worth of all of mankind, but I'm not an ancient.