Sometimes you just have to trust the person you are sitting next too. Some faults do saturate the PF, dual hydraulic, smoke fire fumes etc and looking to get it on the ground asap. Sometimes the cockpit does split, it's not exclusive to Airbus either. It occasionally ends up being trying your best to stay in the loop, but flying the plane always comes first, what's the point of being in the loop but the plane is soon to be not flying. Guarded switches of course have a look and try to have a think about the consequences and what is trying to be achieved before confirming, same with the clearing of ECAM, it can just be a case of doing your best in a bad situation.