This is the feeling I'm getting as well after the post you quoted. Seems like OP is more interested in discrediting others' reasons for selecting the Pro over the 11 than having a meaningful discussion.
Personally, the biggest factor for me was the size. I used the XR for a few days last year and really tried to get used to it but it just wasn't comfortable for me. A friend of mine still has his and any time he hands me his phone to check something out I'm reminded of how happy I am with the size of the XS/Pro.
The fast charger in the box, OLED display, improved battery life and additional camera along with being the ideal size in my hand absolutely makes it worth the extra $300 for me. Not everybody will agree and that's cool.
I had the 256 XS last year and when I went to upgrade, I was using 72 of that 256. I see that as a massive waste so I went with the "gimped" 64 for my Pro. I'm currently sitting at 34 used.