Traditional Culture Encyclopedia - Photography and portraiture - What's wrong with Nikon D80' s automatic portrait mode and portrait mode?

What's wrong with Nikon D80' s automatic portrait mode and portrait mode?

Some are clear: that's the focus.

Some are vague: that's out of focus.

Because the depth of field is too shallow, you can focus accurately by lowering the aperture to 8 or 1 1. ?

Please refer to page 28 of the instruction manual: