Since we are hearing this very 2nd hand, it is hard to really know what is going on. You claim there is no problem with parents, but I've heard that before from my husband's siblings who are in complete denial so unless we hear information from your brother directly, it is hard to judge what is going on. My guess is that the therapist is responding to information your brother told him -- I kind of doubt this is coming randomly. There may be something else going on with your brother that none of you understand at this point. If nothing else, perhaps your brother needs time and space away from family to cope with whatever is going on with him. Rather than fight him on this, maybe the family tactic could be to show him support in taking the time he needs to work through his issues. Respecting his decision to do so but leaving the lines of communication open for down the road when perhaps he might be ready for contact.