I’m not intending this thread as a mere exegesis. Hence the “furthering” in the title.
But by all means, we could delve into Morality As A System Of Hypothetical Imperatives.
Here’s a link: https://sites.pitt.edu/~mthompso/readings/foot_mshi.pdf
She argues against Categorical Imperatives as foundational to moral claims, and specifically addresses the difference between etiquette, and ethics: that ethics is important. It’s deontology that makes ethics into etiquette, not Foot.
Anyone want to go through it step by step?
(Addenda: No reply to that question. I set it up anyway: Foot: Morality As A System Of Hypothetical Imperatives