When you jump from operational lab science to speculating about macroevolution- you leave the realm of science and engage in hypothetical science, and doing so you need to include origins if you are goign to make hte case that species evolved one from another- you can’t exclude origins of hte species simpyl because there is no rational explanation- you MUST show how life began and how it was possible to for nature to move species beyond hteir own kinds- stating that macroevolution ‘study’ doesn’t include origins is a copout
Why?
Darwin himself was very clear he had no theories on this point and didn't seem to be bothered by it.
Evolution, in the original and reasonable sense of the term, involves how organisms change over time. How the organisms came into existence in the first place is outside its field of study.