Because in a civilized society, everyone is presumed innocent until proven guilty and the accused are given some level of privacy until that happens.
We no longer live in a civilized society
But we are in the USA, where the majority of convicted criminals were never proven guilty because the system relies on coercing them into not going to trial.
Say who? Literally the entire news media loves airing trials before they're proven innocent or guilty.
Someone should tell that to the people who publish the gas station mugshot magazines.
Civilized societies don't shut down the paths for people to air their grievances.