Hi. At night I can undestand for long haul flights. But during day time with no embedded CBs, unless you are using charts to cover the windscreen, I would trust more my eyes for weather deviation than the radar system.
I'm with back to Boeing.
There are surely all manner of operators of aircraft that peruse this forum, some ideas I might endorse and those I might strongly object to. It wouldn't be nearly as interesting if we were all the same.
I think what's important with radar, is situational awareness, after all, stumbling into a CB by accident is something hopefully ever done only once. If it could possibly happen, it will happen. Are we all fallible? Yes. Despite what the aces here might think. So for me, leaving the radar on, but paying attention to how it's set up, is the way to go.
Covering your windscreen with charts? That was a no no, in my cockpit.