This is a required step when performing maintenance on leaking crankcase breather covers. The factory screws are an aluminum alloy and attempting to re-use these screws ends up just 'stretching' the screws which means the RTV seal will fail. The larger screws that hold the valve covers on do not need to be replaced (IMO).

I also recommend checking the valve cover screw torque setting as a routine maintenance task every year or 2. I have found these loose during a re-check in the past. And by doing this, I haven't had any leakage from the valve cover gaskets so far.