I agree with everyone and will add PT'ing is about selling.
you want the people coming back for more sessions.. it's almost like going to the dentist and him wanting to do fillings, crowns, root canals. he has a mortgage and yacht payment and he needs to do work on your teeth more than just cleaning every 6 months.
that part of it makes me uncomfortable and I would rather help the person reach their goals, but if you want to PT full time for a living and support a family on it you need to be a salesman, get people back, and build up a network using marketing tactics etc. it's just like selling cars, plus you gotta deal with other salesman who are going to get pissed if you take business from them