There is absolutely a difference between a copyrighted image and a free to use image, even if I know the copyright holder is in no position to sue me. Likewise, there is a clear difference between someone's protected invention (if they have passed a very high bar over prior art, obviousness, etc) and the way the problem is always and usually solved. (If at all.)
I can respect a real patent just as easily as I can respect a copyright, and so it is hardly fair to say that a patent is nothing until it is tested in court.