Because it works and provides a use case. Most “simpletons” do not want to invest any more time in than putting some Account Data and start watching netflix or whatever. “We” (e.g. the people that care about data privacy and stuff) never have been okay with that shit…
That however only works in a sort of sane, trusting and honest environment - basically something to undermine to begin with. If everyone is just utterly hellbend on lying and twisting reality, it becomes just noise and has no impact.
Capaldi and Matt Smith are my personal Favorites. I like Tennant, but the utter “sassyness” of Smith and Capaldis versions where sublime to me…