As someone in the trades, I really disagree. Most applications that require a hammer could not be accomplished with a nail gun. Nail guns are great for attaching thin materials over thicker materials, like putting MDX onto a frame or attaching roofing materials. You don't generally frame with a nail gun because you want to use larger and heavier nails driven a lot deeper. For very light or precision work on finished surfaces you go back to the hammer because it reduces the chance of scuffing or marking on the surface.

"Binding wood" is much more nuanced than you make it seem.