For me, procrastinating by looking at websites is usually a sign that something else is wrong, e.g. I don't really see the purpose of the task I'm supposed to be doing. When I'm excited by a task I find I don't procrastinate. Unfortunately it's not always possible to choose just the exciting tasks for my plate!

I think so—there are multiple trillion dollar companies out there whose business model is to take your focus. If you can out compete a trillion dollar company, that’s pretty good, right?

I think a better way to think of this is breaking habits. While some people do an innate struggle staying on task, there's also a large portion of people who have built the habit of task switching and just need a tool to help them break that habit.

In today's world: yes. The flip side of some types of ADHD is hyperfocus, where you can simply lose hours doing something and forget to eat sleep or drink, you're so focused on a thing.

I've wondered this as well. For all my faults, I can quite easily focus on a single task for an extended period of time.

In fact, if I've got a project that I'm actually interested in, it'll consume weeks or even months of my time, to the point where I have to make an extra effort to break my focus on spend time doing other things (like going outside).