Truth is that people largely place trust in institutions and people they are used to and identify with, often for irrational reasons. People are prone to FUD. Theyre lazy and passive.
This means that, for example, Rupert Murdoch has a disproportionate level of political influence in the UK because he dominates media through which people watch and read about sports.
And Tiktok is an effective propaganda delivery channel because it already feeds kids videos of dances they like.
Sadly, programming people on a mass scale is just as effective as it ever was because it turned out how trust is acquired mattered way more than mere access to information.