You probably get it by now, but we're going to keep rubbing your face in the facts, nonbeliever. A bit of body odor might seem like a minor inconvenience, but it gets a whole lot more important when sneaking up on an animal that hasn't spent the last millennia losing its survival instincts means the difference between feasting and starving. Finally, an accidental fire near your ammo stores that could easily have been extinguished with a dose of nonflammable powder will certainly put a damper on your plan to make it through the end times in one piece.
You forgot one…..the invisible prepper! There are more than enough of these preppers! We have the ability to shop and store without anyone noticing. I don’t need to brag, because when the SHTF, there is going to be enough people that are unprepared and begging. We’ll just state, we are in the same boat…but little do they know. I can’t save the world, only my family.
Tenacious Tape is not the kind of survival gear you won’t use every time out but when that rogue branch falls on your camping tent and rips your fly you’ll be thanking your lucky stars you have it in your bag. It can prevent a difficult situation from turning into a life threatening one. Tenacious Tape is completely weatherproof and won’t ever wash out. It doesn’t leave any tacky residue and is also machine washable. It’s the kind of quiet innovation that elevates the outdoor experience for everyone without making a lot of noise and is essential survival gear for any outdoor aficionado. Available in 3” or 20” rolls and a variety of colors.
From the SpeedSafe, one hand assisted opening to the 4 position pocket clip to the uber-secure liner lock that prevents the blade from closing on your fingers the Brawler from Kershaw is the kind of safe, effective survival gear you want at your disposal when things get gnarly. The modified Tanto blade has a pointed tip for precision work, spearing or piercing and the high carbon holds an edge longer than standard carbon steel blades. An invaluable addition to your emergency supplies when the weather closes in and you’re miles from nowhere.
This group stresses being able to stay alive for indefinite periods in life-threatening wilderness scenarios, including plane crashes, shipwrecks, and being lost in the woods. Concerns are: thirst, hunger, climate, terrain, health, stress, and fear. The rule of 3 is often emphasized as common practice for wilderness survival. The rule states that a human can survive: 3 minutes without air, 3 hours without shelter, 3 days without water, 3 weeks without food. 
Lastly, there are no “EXPERT” preppers that I know of! Just as there should be no one directing, suggesting or quantifying anyone’s efforts toward being ultimately prepared. We are all in different stages with any of the attributes required to be our best, not someone else’s best. There are just way to many factors that have to go into the equation for one person to know it all. I learned a long time ago to never point out a problem without recommending a solution. I feel survival training through this venue is best served by not casting doubt, mistrust and pointing out scary gaps in plans being worked on. Instead, Train skills, knowledge and attitudes. The “How Tos”, “Where to Find Useful Info” and just the considerations of the attitudes. Let the individual prepper decide how it fits into their specific plan.
Each type you listed (save a couple) will have its uses in a community (group if you will), generally having a small trusted group with each having several skills in the various fields (prepper, homesteader, and survivalist) I believe would be an effective team, though as each group works together would it not be best to ensure that each has overlapping skills in case of injury, death, or other reasoning they can not fulfill their duties?
Another concern when you’re lost in the wild is where to procure potable water. Sometimes there will be bubbling streams of crystal clear water rolling down wooded hillsides to fill your water bottle and sometimes you’ll have little more than a stagnant pool standing between you and dehydration. The LifeStraw Personal Water Filter is survival gear that can turn that stagnant pool into a lifesaver.