While I agree with the main thrust, I have issues with the logic presented here. Primarily, not all that is good is natural, and not all that is natural is good. For example, bad knees and dying in childbirth is quite natural, but I think it’s good to save other humans from the negative effects of these preventable conditions wherever we can. Humans, like chimpanzees, seem to have a natural proclivity for violent behavior which is not good despite being arguably very natural.
I think we should aspire to do good things even if they don’t come naturally to us, and likewise, we should not use nature as a model to decide what’s good. I prefer that we take more responsibility to carve out our own morals. Nature is brutal, violent, and sometimes grossly inefficient.
Finally, I believe those morals absolutely should include treating women as people, which is a surprisingly controversial position these days!
It’s defined however I say it is defined, with myself taking full authority and responsibility for my own definition of good.
I define it to be the utilitarian definition, selected and preferred by many because it has the stated goal of maximizing happiness of the most people. I think it’s a formal way of stating what most people intuitively recognize as “good.”