While not everybody gains much from it (you for one) there are those out there who find certain benefits from using it, whatever they may be - and I'm sure they probably differ for one to another. So I guess the big deal is simply that they're out there to provide an alternative, a choice... and choices are never a bad thing.
I wouldn't give it a second thought if I were you. You tried it, found it was nothing special, and you can move on, all the wiser for the experience. Plus, you can now offer your opinon on it to those seeking information on how it might effect them, and provide counter point to those who swear by it.