I have a USB-C to audio jack adapter/sound card, which doesn’t provide enough amplification for my headphones at “normal” levels, so I have to raise it beyond what android considers “save” in order to even hear voices enough to understand them, if the environment around me is a bit noisy itself. At maximum level it is still not really loud.
To simplify, two main reasons. First when done via revolutions it often causes economic and societal shock in which autocrates take the power away from the people. And second, when done peacefull, foreign intervention of secret agencies which again try to put autocrates in powerful positions.