insofar as it tricks people into thinking they are getting better at talking about that which they’ve buried, that which they think, that which they feel, that which is true.
Of course, being able to speak honestly is a truly vital skill and cannot be placed in the bin of Stuff I Accept I’m Bad At if one hopes to live anything close to his best possible life.
But make no mistake, candor with a stranger (i.e., therapist) is not such a vital skill. It’s something, sure, and there are benefits that may be cultivated in the process. But the same fears of judgment and rejection that usually prevent “speaking one’s mind” are significantly reduced in interactions with strangers. Thus, you aren’t actually getting better at speaking well with people you know, just at speaking well when nothing’s really on the line.