just think de Grey glosses over way too many obstacles
I've met Aubrey, I've read his book and I'm sure that there aren't many people more familiar with the obstacles. I think he can perhaps seem like he is "glossing over, because he answers the same questions about them over and over and over and eventually, you take large answers and boil them down to an elevator pitch, if nothing else, to save your own sanity.
Aubrey is a crusader. We need more Aubreys. Aging is a disease and we need to solve it.