The Phrase 'Thanks for Sharing' is Often Used as a Lying Psychological Control Mechanism

"Thanks for sharing" is often used as a brush-off and a way to control the conversation without any meaningful response.  It's also a lie, because if thankfulness was involved, that thankful person would want to hear more or to respond meaningfully.  The phrase seems positive even though it's a brush-off, which is meant to stop the conversation by putting the speaker at loose ends while he figures out how to take the positive-sounding brush-off.

Sometimes, it could be genuine.  In that case, edification from the preceding will have truly taken place, and further comment is not strongly stymied.