People love the PS4, rightly. They also, rightly, don't care nearly as much about the PS4 Pro. It's not just casuals, it's also the hardcore crowd on forums such as this. All told, it just isn't a very substantial upgrade over the base console. A $500 Xbox that is significantly more powerful than the PS4, PS4 Pro, and original Xbox One/S is, unlike the Pro, interesting. Specs and features wise, it's that much better both for consumers and developers. I have a Pro and a 4KTV with HDR, and I still wouldn't recommend it because of how minimal the difference is that you're getting. The base PS4 is just a better value and, with all things including price considered in the equation, a better console.
To put it another way: The Xbox One X is a better value at $500 than the PS4 Pro is at $400 or even $350 presuming developers do put in the time to optimize. Judging by what we've seen just the past several days, I'd say they're off to a good start. We won't know for sure until a few months after launch, if not many months, but it's already better than what we've got out of the Pro. If someone wants a PS4, getting a slim on Black Friday with several deals on many of the system's best games would be a much, much better deal than paying extra for so little with the Pro.