The price is not even that outrageous. When specified similar to the top-of-the-line ThinkPad X1 Carbon it's only $200 more, and you're getting a better display.
Using similar specs, (i7, 16GB ram, 512GB SSD, UHD screen) the MBP is $600 more than the XPS 13. And the XPS gives you the option for a 1080p screen, saving money and increasing But price aside, the real deal breaker for me is the soldered in SSD on the MBP. Being able to upgrade or recover data by removing the SSD is a huge benefit in my opinion.
But a much worse keyboard.
The X1C6 is pretty expensive unless you’re doing some Lenovo EPP swindle.
The X1C7 just came out so the price will be dropping like a stone on the 6th gen pretty soon.