I understand the privacy part now, thanks. Why is manipulating people bad? We are manipulated every day by various psychological factors, like seeing someone e

I understand the privacy part now, thanks. Why is manipulating people bad? We are manipulated every day by various psychological factors, like seeing someone eat and getting hungry, and the government for example exerts economic pressure for unneeded items like cigarettes and alcohol with a sin tax, manipulating us to not buy them as much.