This information is invaluable. The idea of stressing the importance of private keys cannot be overdone. It is the central to all that occurs in the crypto world.
Whoever controls the key, owns the wallet. It really is that simple.
You are really showing newer people a great starting point. A key is not like a password and that is what I thought when I got here. I admit I am not as cautious with my passwords as I should be. Do this with keys, and there is no lost key button...you are screwed.