I think it’s just true for the vast majority of countries, unfortunately. A country has to have a lot of things figured out and done right before it can regulate and train its police force so well that its population doesn’t nearly universally agree with the ACAB sentiment. Or at least doesn’t belive they’re all incompetent.
This is a real problem with changing your mind.
I can’t believe how many times I’ve been told I’ve changed when I no longer found something funny or said something that I wouldn’t have in my teen years.
One of the longest-running opinions of mine that hasn’t been disproved yet is that many people just don’t really mature or age mentally, it seems; they just grow older, without accumulating much if any wisdom.