You claim that there are "defenders of the myth" that all clones are identical.
You also provide examples of organisms that reproduce asexually or are being stimulated to reproduce asexually (worms, tobacco cells). Are those clones in the same sense that Dolly (the sheep) is a clone produced by inserting a particular sheep's DNA into an emptied egg cell?

So, we are back to the original question. What current biologists have claimed that all clonal reproduction will result in identical individuals? I could try to prove there are no biologists that are "defenders of the myth" by interviewing every biologist in the world. However, it would be easier for you, since you have done the research already, to produce one that does defend that myth.