SBMI am in the same camp as Neil's pal Sherman quoted in the same news nation article :
“I’m just totally mystified. I have no understanding whatsoever how you can walk out your front door and vanish,” Sherman McCorkle told NewsNation. “Nothing makes any sense.”
I don't see all this mystery.
I feel like we have seen things that didn't make sense so many times in cases of missing persons, and then often things turned out to be simple in the end.
It's hard to know people's mental state and speculate about what made sense in their mind at the time, so many details may not add up to us.
Call me naive, but I'm still with Occam's razor on this one.