> But politicians are - in general - neither evil, nor do they have any real incentive to ”control citizens’ thoughts”.

As someone coming from authoritarian state, this is such an alien line of reasoning to me. By definition, those in power want more power. The more control over the people you have, the more power you get. Ergo, you always want more control.

It's easy to overlook this if you've spent your entire life in a democratic country, as democracies have power dynamics that obscure this goal, making it less of a priority for politicians. For instance, attempting to seize too much power can backfire, giving political opponents leverage against you. However, the closer a system drifts toward autocracy and the fewer constraints on power there are, the more achievable this goal becomes and the more likely politicians are to pursue it.

Oh, and also politics selects for psychopaths who are known for their desire for control.