I'm also surprised when cashed up celebs (anyone cashed up really) doesn't try a number of things that are being looked at these days...
Psychedelics
Lsd, shrooms, Ayahuasca, iboga, san pedro, ecstasy, ketamine, etc.
EMDR? Is that that tapping one that worked well for Neal Brennan? There's a guy who tried quite a few alternatives.
Edit: Maybe the tapping one is TMS(?)