In my case they were asking me to visualise what ion was doing at my most happy I've had life long depression and can't have meds so it was really tough to do, in the end it was narrowed down to things I'll simply never be able to do again. There was no realistic visualisation if you know what I mean, for example, I self treated depression with exercise which meant swimming miles each week or so walking local mountains - I was swiftly told not to once diagnosed as getting help would be impossible, also I didn't know that knees weren't meant to bend upwards so ignored the problems that caused me (life long EDS issue for me) which resulted in my knees being badly damaged by the time I was taken seriously, the damage caused by changing clothes and losing consiousness in the local pool (we no longer have one) meant I was unable to go swimming anymore and I loved swimming. It was my "thing".
I expect if it's done realistically with realistic goals it could work but the bluntness of mine was devastating. I'm almost housebound so asking why I don't "want" to travel all over the uk again (as I did when younger) and desperately want to was seen as a lack of trying/effort rather than disablility. I was offered a "worker" to encourage me, but that's no use when I'm in agony sitting on trains/buses/in cars which now have ergonomic seats which are for agony as my joints are so unstable now.
I suspect if there was psychological support via a specialist who actually understood my physical needs beyond the line they get in a standard textbook it would possibly be different.
It's difficult for me perhaps helpful for others.
I was thinking about the poster who asked if it was going to be a depressing sort of board, race to the bottom sort of thing. I've been in support groups like that; generally if run properly and someone is there's to oversee such things then such experiences can be managed. It's not always possible, and I've been in NHS support groups managed by nurses/therapists who just didn't manage these issues at all and would then complain if someone else tried to set a group up assuming it'd be the same sort of thing. I set up a group twenty years ago and mostly it went well but we did have someone join who was determined their illness was the worst (we all had the same to varying degrees) and would show off all the time, which meant others then did the same thing, and I left as I couldn't cope with it.,looking back I think that was a lot to do with being face to face and the dreadful treatment locally where "be grateful you don't go through x, y and x" was standard and they assumed we would be the same as there was a lot of comparisons going on. I don't think a board would be like that though. If there ever was one of course!