Sure, but it’s much more effective when the messaging is targeted to an individual (or, small cohort of similar individuals) based on their interests (known, at a granular level, because of what they watch for how long etc)

Mass media isn’t individualized in the same way

Is mainstream media designing a user-specific content feed that is adjusted to your specific preferences? Your argument sounds similar to the one used against arguments of an encroaching police state: sure it has been done before but not at this scale or with this level of sophistication.

Yes, now just imagine if mainstream media could create millions of TV channels specifically designed for each human being instead of broadcasting one channel to millions of human beings?