They are building unnecessary suspense for audience who have not seen KD or NM.
So if they show his POV or monologue, him talking to sane people like Aai, Shivani Bua, then his thoughts will be clear.
He will be shown ki kaku and Pakhi apne khillone ko itna chabi ghumati hain, he will say so much that he will fall in the eyes of audience and FL, that Sai ka batameezi will be forgotten.
Now when everyone thinks he has been pulled to dark side, there will be an unexpected twist for TV audience.