Heh, so I installed a new faucet in our kitchen sink and thought I’d done a good job, I had hoses snaking all over the place and my wife was like “I can’t even use the pull-out sprayer because it won’t go back in once I pull it out.” So a few months later I call my plumber and ask if he can replace the valves under my kitchen sink because they’re old and the tolerances are outside my skill level for trying to saw them off and replace them. He comes out, spends an hour replacing the valves and then he’s like “oh yeah, I fixed all the hoses under the sink for no charge, the last guy did a horrible job, you can’t even use the sprayer!” I look under the sink and it’s like NASA came in and rerouted everything, tons of room, no crazy hoses hanging down, and the sprayer works!

Never mind 20 years old, I use a puller for much younger cartridges. Saves me needing the pull and pray method.

This is one of those things I believe to be more about feel.

That plumber has done this 1000 times and will make it look easy.

They can pass you tools, walk you through it, give you as much help as you can possibly receive, but you'll struggle a ton anyway. Or, as you say, break it.

Practice makes perfect. Sometimes it is still cheaper to get somebody who knows what they're doing. We can't yet remote that in.

Maybe for simple things. Have you ever tried to plaster a wall or ceiling? You can watch 100 videos of how its done, if you don't have the motor skills and muscle memories it's not so easy. And even 'simple' DIY might be doable for a sample of the population but there are also people who struggle with putting together flat pack furniture. Are they going to be brazing their plumbing after watching a youtube video?

Personally, I see society going in the opposite direction.

Back in the 1980s there were a lot more jobs in manufacturing, doing things like manual machining; and every driver had to have basic mechanic's skills because cars needed constant tinkering.

We've got many more youtube videos showing how to use a hacksaw - but far fewer people who use hacksaws on a daily basis.

I love all the downvotes for something that is definitely going to happen. YouTube how-to videos are just the beginning.

They will be but that will be delivered to your home for rental.