There are too many reasons. One of them is that the energy of thinking is not strong enough, which makes thinking easy to stay in a corner and unable to turn. Coupled with the subconscious behind thinking, there is an obsession that I haven't found, which leads to thinking being imprisoned more severely by the' corner' confinement, so it becomes even less motivated.

In fact, stubborn people subconsciously have an obsession, which is too deep for them to find themselves. Under the control of that obsession, their main consciousness will involuntarily revolve around that obsession, leading them to involuntarily defend that obsession through various distortions, and their main consciousness can't find it in the whole process.

Stubborn people are mostly self-obsessed, and strong self-obsession makes them constantly protect that self-obsession by distorting their subjective consciousness. In particular, the deep attachment to dignity and fame and fortune is hidden in the subconscious like a powerful heart mill. On the surface, their main consciousness is stubbornness, sophistry, distortion and unreasonable troubles. In fact, motivation is still maintaining subconscious attachment. Attachment is invisible to them, because it is too deep and too close, just like people who dream in their sleep. They don't know that they are dreaming in their sleep.