> Supply and demand as the reason for profit percentage increasing margin makes no sense. I’d be interested in how you’d debate that.

That was never my argument. The commenter I responded to edited his comment to add those points after I replied. This was his comment before:

> Companies cannot set prices arbitrarily

[Source required]

That is pretty obvious from where it says “Edit:”, what isn’t obvious is how Supply and Demand prevents companies from setting prices arbitrarily. Which is and always was what your comment said.