> But in any case, provide some alt text! If it just says "divider", "logo" or "decoration", that is still better than nothing for someone who can't see it at all.

This is a generalisation and one that many screen reader users wouldn't agree with. People who can only read through audio or braille are already facing certain disadvantages, such as not being able to quickly scan a piece of content in the same way visual readers can. Polluting the content with meaningless alternative text makes for an overly verbose user experience.

> Empty alt text means no image description. Think about that. You are blind. Your Screen reader tells you "image", nothing more.

This is factually incorrect. Using an empty string as the alt attribute on an image is the correct way to mark an image as decorative, and as such a screen reader user will never be informed about its presence. If the alt attribute is omitted entirely, that's when screen readers try to guess by announcing the filename and/or URL (or on iOS, actually trying to perform object recognition on its contents).