In article ,
RichA wrote:

I've never understood why I can use a quote or short passage from a
copyrighted book as "fair use" and I can't cut and paste a photo where no
commercial revenue is seen? However, I fully appreciate that anything that
might be used for commercial purposes is under protection.

even a short passage could be considered infringing, depending on
circumstances.

fair use is a *defense*, not a right.