My wide angle lens's focus goes slightly beyond infinity (it's the same for most other lenses too). If I turn the focus ring all the way, as far as possible, the picture will not be as sharp as a properly focused one, even at 12 mm zoom (APS-C) and f/10. So the whole scene will not be "automatically" in focus, regardless of how the focus ring is turned.

Manual focusing does require some skill and good vision, especially in a small viewfinder. If the user doesn't have good vision or is not willing to put in the effort to carefully examine if the scene is in focus, then it probably won't be a good experience using such a lens.

It is definitely true that accurate focus is less critical with a wide angle lens than a telephoto. But a wide angle lens does not eliminate the need to focus, at least not unless you somehow manage to lock it at infinity focus and then only shoot things that are far enough (which is not that far with a wide angle).