I heard this one numerous times- never been told so by my T though.
I think clients are doing their parts of work and Ts theirs- why the heck would I pay my T otherwise? It's just that T's work ends with the session and then it's up to the client whether or not they are going to "use" what they "learn" in therapy.
For me it'd be being more open in my other RS- I'm not, ppl don't know me and/or I'm telling lies to them. I don't have friends I have acquaintances. I am "open" with my T (after 7 yr and only sometimes). T showed me it is OK to do so (his work) still didn't have the guts to take it outside (my work).