Oofta, here's the thing. I know I don't try to scout ahead because the game doesn't really support it well. Let me explain- obviously, I can't scout ahead with a light source. So I have to rely on darkvision, if I happen to possess it, which imposes disadvantage on my perception, which isn't ideal in case I bump into something that is also hiding.
Now presumably, intelligent humanoids use light because their own darkvision has this nifty penalty attached, but many monsters lack hands. Even if my Stealth skills can easily bypass the passive Perception of most creatures, too many times have I seen the scout, who again, can probably see at best 60 ft. (superior darkvision being fairly rare) ahead, blunders into their own solo encounter.