Your run-of-the-mill shoe stank might not pose much of a survival threat, but trench foot certainly will; baking soda is great at absorbing the moisture that might otherwise literally cause your feet to rot off your legs. As for the health of your teeth -- it will be pretty hard to get through your day's rations of homemade jerky and hardtack without some high-quality chompers. And you certainly don't want to rely on that pesky fluoride that will "kill your brain over time" (um, what?).
Again, the reason we tend to look sideways at those who get a little too into prepping for an apocalypse is because of their smug optimism. People actually being realistic about a dangerous future would be better served joining the military or ingratiating themselves with high-level government officials than agonizing about a little mouth scuzz or foot fuzz, right?
I do understand, out of my friends and family I’m the most prepared. I constantly go out to the middle of nowhere and put my skills to the test. Just for argument sake, but what if someone is more equipped than you? What if someone else is better prepared ie: more knowledgeable, more practical experience, time in the field putting skills to use than all others in your group? What then, does it mean that you would sideline someone more equipped mentally than you and all others to lead over your own pride?, Or would you go against what you have said and actually not jeopardize your groups well being and let the more experienced person led. To give your group the best possible chance of survival, or would you possibly condemn your loved ones and friends to a fate of death or even worse over your pride?
And, of course, people aren't going to stop wanting to get drunk just because they can't pop over to the corner bodega for a six pack whenever the urge strikes. Portability and long shelf-life make liquor of all types a valuable trade good -- people will kill to get a taste of the delicious bottom-shelf leftovers from your local dive bar when their only other option is the equivalent of prison wine.
To me, the best option is to store emergency food. How much? If you have none, store enough for a few days. If you have enough for a few days, get enough for a week. How much you store depends on what time frame you think you're at risk for having to be completely independent. The early settlers of the southwest liked to store enough food for a whole year and still do to this day!