Because what works for you does not work for everybody, and different people may have different propensities, impulses etc.

You put some spatial restrictions (no tv screen visibly standing permanently in the house). Some people put time restrictions because that works for their case. It does not mean that they do not want to use these "wondrous technologies", they just want to spend some amount of their time doing something else. Saying "this works for me, everybody should do that" is absurd, something that works for you could work for some, but there is no reason to think it may work for everybody. And you just overlook how certain stuff are built to be addictive/attention grabbing, through A/B testing and research and tons of high-end specialised human capital in order to increase profit from advertising.