Every lawsuit filed takes up judicial resources. QI is an effective way to dump a lot of frivolous lawsuits, it just happens to have a really high false positive rate for “frivolous” (and happens to be unconstitutional IMO).

There aren’t different courts for lawsuits against the police. It’s not just police sitting on paid leave but innocent people languishing in jail while their case drags on and actual disputes that aren’t frivolous dragging out rather than being resolved so that the parties can move on.