Most people have no business using a pneumatic nail gun. No business at all. You won't hang pictures any faster, and your doghouse will probably look the same. Technically, everything done with a nail gun could be done with a hammer.

But if you didn't know what a nail gun was, never imagined the thing, could you imagine framing a 2-story house by hand? A large house might need teams of arms & hammers. Dozens. You wouldn't even see construction as the same kind of thing: more of a coordinated work of labor, like aisles of rowers on a trireme.

If I can type so fast I can think out loud into the machine, the flow changes. It's likewise hard to argue how a REPL changes much anything, since saving & recompiling is fast, but I think flow is rather important.