As a driver would I drive in poor vis with only so-called sidelights on as opposed to dipped beam to ensure I'm seen? No. I don't believe in half measures. As a diver with over 400 dives in our cold seas, would I fly over water in an immersion suit as opposed to a lightweight drysuit with a good quality undersuit which I know will keep me alive for much much longer? No. I don't believe in half measures.