OK my claim was that natural selection was being credited with some changes when there were other mechanisms that allowed living things to change. The evidence for this was in the paper which stated in plain English
SET explains such parallels as convergent evolution: similar environmental conditions select for random genetic variation with equivalent results. This account requires extraordinary coincidence to explain the multiple parallel forms that evolved independently in each lake. A more succinct hypothesis is that developmental bias and natural selection work together4, 5. Rather than selection being free to traverse across any physical possibility, it is guided along specific routes opened up by the processes of development5,
6.
Does evolutionary theory need a rethink?
I do not need to write to the author to explain this to me as I understand it quite well. Developmental processes and in this case
developmental bias can produce certain morphological outcomes as opposed to any outcome as proposed by evolution. In the case above the author is questioning how the similar outcomes for convergent evolution are based on extraordinary coincidence through Darwin's theory where natural selection acting on random mutations happened to select similar forms through adaptations over and over again. Because we are seeing a lot of convergent evolution even down to the genetic level the author is saying that rather than this being solely about extraordinary coincidences that developmental bias is producing these similar forms and natural selection comes in later to consolidate things.
In this sense these morphological changes are more directed rather than blind chance happening to line up over and over. But some attribute the entire morphological change to natural selection only. The above example shows that the original form was produced by the developmental process and not selection. Natural selection came in after the trait was produced to refine and consolidate things.