That works better but is expensive - quite often you have to show the public route has failed before you can justify active recruitment.

Also large companies intrinsically know that in the end active recruitment is a bit of a zero sum game - you poach your competitors staff they poach yours - so there is a hesitancy in getting involved in that game.

I have seen people who are actively recruited ( hey we think your great please apply ), who are then forced to do these kind of HR screenings ( because that's the process ). This clearly doesn't make any sense and sends entirely the wrong signal.