I feel like youre arguing a different point here. I agree with the other person that hooking a macOS machine to a non-HiDPI monitor makes for an awkward (Id call downright bad) font experience, due to them having removed subpixel anti aliasing a few versions ago. It was so jarring to me that I took closeup pictures of the pixels, and they were all rendered really badly on a 1440p screen, to a degree that you can't claim that typographers would disagree.
https://news.ycombinator.com/item?id=17476873