When I was undergoing my first diagnosis in Oxford, and was still working, I never let my religious beliefs go.
Although I am struggling to cope with my faith these days, I still have "Hope"
I personally feel that this is the way clergy are trained these days, its not the best way, but with modern Bishops and modern ideas, things like people with dementia etc are largely forgotten as a waste of effort. In other words the days of pastoral care and visits from clergy are long gone and confined to the history books
Yes we lose so many hobby's and things we enjoy in life, but we have to adjust and move on, and I guess if that means losing touch with our religion, then so be it. Its not easy but we need to do want is best for us, and forget everything else.