I think it depends on the circumstances. For me as a client with a male pdoc, I need tighter boundaries help me from getting too attached. I rejection/abandonment with men, so even if I want to get closer I know at some point loose boundaries would end up hurting more than helping in the long run. I also have a great relationship with my female T, but but no transference or attraction issues. So if the boundaries are looser it doesn't affect me one way or another.