An excellent post!! Not a wasted word, many aspects covered. " basics like sharpen and tune a saw then maybe they shouldn't be let loose with a saw."
That being said, sharpening a saw blade isn't necessarily the dark art it used to be. I've sharpened, literally, thousands of chains. Then I found the Stihl "2 in 1" sharpener. It'll crisp up a chain in three to five strokes, after every tank. And, it sets the rakers ( depth gauges) at the same time. Sure, I could do a bit better by hand.. but for the mindless simplicity of the 2 in 1 ... I'm in! Tuning ( for a youngster ) should be left to "Yoda" , with the Padiwan watching and asking questions. It's a learning curve. Twenty years in, It's still a skill, that I'm good at, but have not completely mastered.
Correct fuel to oil ratio? Oh Hell yeah! That's basic math.. moving decimal points etc. The inability of a millennial to be able to figure out 50 to 1 in any format ( liters .. quarts, Imperial, US ounces), is a horrible commentary on our educational system.
"It's a serious accident just waiting to happen." I've personally never understood how any person could walk into any store and buy a 100 CC saw.. no license, no training, no nothing. Effin incredible that that exists. You need ,( at least where I live), a license to Hunt, buy a gun ( of any kind). But.. "Here sir, Here's your saw" ..... No requirements.. My first saw was an Echo CS 400.. I learned from YouTube.. I was very.. very ...very lucky..