agreed and to add to this:

Dedicated devices for secure communication set up by someone who knows what they’re doing are ideal in this situation.

becoming your own expert is unfeasible for 99.999999999999999999999999999999999% of people and expecting it is no different than expecting people to become their own lawyer, dentist, or doctor.

If you’re being targeted by an intelligence agency from a rich country that has allocated a significant budget to surveil you in particular, you’re probably screwed

the bar against protecting yourself from the local police in the united states is MUCH lower than the cia, nsa, mossad, etc. and should be the goal of most projects since it's the most realistic and the most likely to happen; there's next to nothing that can be done against he alternatives.

the alternative is that unfeasible ultra high bar and judges in the united states have a history of holding people in jail for years for contempt of court of not providing passwords or using duress like options on their electronic equipment.