I guess I am lucky, I had excellent scout leaders, almost all were very proficient in at least one area of outdoor lore. We had excellent hunters, navigators, and outdoor cooks
Most had a good amount of common sense too.
Once, a scoutmaster and I had stayed late shooting a black powder rifle at a public range, a 3-4 mile hike from our camp. Everyone else had departed several hours before and we lost track of time having a shooting competion and sunst was upon us. All we had was a pin-on bubble compass, a bag of carmel chews and a canteen between the two of us and his rifle and possibles bag. I those days I carried a gerber gator folder on every campout. We started off and quickly lost the poorly marked trail due to darkness. We sat down, ate some candy and had a drink. Then he calmly used the situation as a learning experience and had me use dead reconing back to our camp using star navigation. We got in well after midnight....could we have been more prepared? yes. I was probably 16 and don't remember being scared or worried at all, because I was supremely confident in the outdoor skills of this leader. And he was good leader because he made me solve the problem with my own knowledge and skills.
My hats off to all who volunteer for BSA.
Now back to the OP...
I think the scout ten essentials are a good base line, in fact even in the scout handbook (I still have mine-signed out all the way to Eagle

) you are supposed to augment them accordingly with additional items as required by the type of outdoor activity you are enjoying. The main thing is it teaches you a "be prepared" mindset. This lesson still follows me to this day. My son is 5 and will begin scouts next year - and I look forward to getting involved. BE PREPARED is one of the best lessons you can learn - it teaches you self reliance and accountablity as well as responsibility to the team.
Typically, I add my CC weapon and ammo to the list, since I carry them around EDC anyway. I also bring a canteen cup everytime I hit the outdoors - a good insurance policy if you ever need to boil water.
Some will add an subtract as required for thier purposes ... and this is good. It the preparedness mindset and skills owned that will carry the day.