A lot of mindfulness things I have seen advocate accepting thoughts and observing instead of repressing them, I'm not sure it is fair to lump all of those things together.

You cannot deny there is a duality of subconcious vs conciousness in most people, but I definitely agree with you, if there is not a unity in those two parts, that can cause a lot of misery.

I find this video helps my understanding: https://www.youtube.com/watch?v=cWIJPSji6PE