Well, as much as reiki healing is.
AFAIK, it's (and I'm speaking of credentials, I'm not saying that life coaching can't be useful to some people or that everyone offering it is a carrion vulture) sort of like a pyramid scheme with the people already making money taking the money of those who want to make money.
I guess that's what education is all about in every discipline, but life-coaching is a bit more sketchy: the only people taking the certificates seriously are those who are already grandfathered into the field (and thus get to teach) or those who desperately want in.
There's no actual requirement for any kind of certificate to practice so the only reason coaches have to desire one is to shut *other* people out of the game. Can't let the riff-raff start shaking down the clients! But back to grandfathering-in: a guy like Wilcox can use his claim of course-credit or whatever to come out on top of at least the grand-MOTHERs in the field, women with actual experience in dealing with people.
Anyway, the questions he asks on his site ("Have you ever felt like there is so much more to life, but you just don’t know how to access it?") are very bootstrappy; life coaching doesn't seem to deal with ideas of oppression very well and thus I think the biggest problem he and his clients have with pornography is the "waste of time" tact. It's the thing keeping them from getting constant blow jobs from the missus or from becoming branch manager or deacon or what have you.
YOU have the innate power to create
and live the life you dream of living.
Yeaaaah, whiteboy!