Science does not "tell us that" things are "all equally human beings" (the use of the term "human beings" here is already in the moral context). What it does do

Science does not "tell us that" things are "all equally human beings" (the use of the term "human beings" here is already in the moral context). What it does do is allow use to draw inferences like "this thing will likely develop into a person" and "this thing likely won't". I do agree that the "science says" crowd is overstating the case in their own dogmatic way, but let's try not to lay the foundation to do the same thing just with the opposite conclusion.