More so since the characters have been so focused on the prophecy meaning Rand's literal blood and death. It would seem appropriate and within the set pattern to have them all proven wrong and the figurative meaning be the correct interpretation of the prophecy.

Also, that doesn't just mean the Aiel. He also has Galad who is family. And the people of Andor might also be considered blood, though less likely since I imagine there has been a lot of out-breeding with other nations and societies, where as the Aiel are homogeneous.