You do if you are painting your terrain or moving lights, or moving lights that have baked on a object or… or… or…
Personally I would rather just have the unlit option mean (DON’T SHOW LIGHTING, DON’T COMPILE WHAT YOU CAN’T SEE ie. Shadows) even when I turn off view realtime (which likes to turn itself on now and then) it still compiles the shaders…
Unless there is a setting I don’t know about well ya…