Image streaming for just 10 minutes a day can rain your IQ by 1 point per month, 12 points per year. Studies show you can rai your IQ by up to 2 standard deviations (30 points) over just a few years of daily image streaming. We could effectively fix all the NPC's if we can get people to do image streaming instead of meditation.
https://www.youtube.com/watch?v=cNZavaHeSL8&t=25s