My father was a flight engineer in the Navy on P3s. While in-flight his job was to monitor the instruments. If you've never seen the cockpit of a P3, its basically wall to wall instruments.

Low visibility flight is frequently dangerous even when you have proper training. A lot of people that fly are surprised how easy it is to get disoriented in low visibility conditions.

Learning to use only instrumentation is a great and valuable skill, but don't forget that even if you know what you're doing the best option is to avoid bad weather if you can help it.