I don't think taking stuff or giving the therapist stuff to read is a big deal. I also doubt if every client is at the same place so not all of a therapist's clients are going to do the same thing at the same time. Therapists can take care of themselves and surely have the ability to let a client know if things like reading stuff is getting out of hand.
Also, professionals of all types do work various hours that are not strictly 9-5. I sometimes teach and grade papers and write letters of recommendation and do my own scholarship and appear in court etc. all in the same week. It is not every week, but it happens more than one week a month.
A client does not need to worry about being fair to a therapist.