really though, parents shouldn't have to meet some kind of threshold of abusiveness for their children to deserve privacy from them
even if your parents are 100% supportive! it's still important to be able to vent after an argument, or do a "hey is it normal for your parents to..." check-in, or even something as silly as saying your dad's music is cringe. there is no family so healthy that it would work better as a panopticon.