General brake question

I'll be 60 next year. I started in 1974 like an idiot when I was nine. I've been retired from a disability for a while now, but I still piddle around with my own stuff when I feel good enough. The number of stories I hear almost daily pisses me off about the level of "service" people get......especially with our older cars. They are slap easy to work on, yet everybody acts as if they take some kinda special voodoo to work on.
What I like is watching complete morons on YouTube telling you how to do something on a car when they are completely clueless. I see a lot of that when I watch videos on body work and / or painting. I am a hobbyist at body work and painting, but over the years I've gotten pretty good at it. Some of the stupid stuff I see those morons doing makes me crazy. I wonder how many people have watched their videos and were lead down the wrong path.