I suspect you have a marketing background. Say, I told you in 2004 Google was the biggest Search Engine company. If your job was to popularize other search engines you might say, "a brief search proves there are some amazing search engines out there and quite a number of them!"
In my example the existence of other 'amazing' search engines does not change factually the Google is the biggest. I agree there are some amazing animals out there using tools. But that was not the point.
Neither you or I are zoologists and qualified to state what experts unequivocally did - no animal - raven, dolphin, higher ape, has ever under scientific scrutiny performed solved a problem in this fashion without trial and error.
I will check out the links as I love animals, when I have a chance, thanks. (Obviously I won't go back and forth on Caledonian Crow until your or anyone produces peer-reviewed journals (not favorite links) proving otherwise in which case I'm all eyes!)