I have had a therapist tell me why they they might seem off due to some real life stress going on for them at the moment, but I never took as a request to be easier. I figure if they need a break, they will take one and otherwise it is business as usual. I would not send the card - it is not the sort of relationship I have with the therapist. The therapist does not give me cards - why would I give one to them? For me, it would be mixing personal with business and I dislike that and would not inflict it upon the therapist.