Earlier quoted context omitted.
Microsoft tried the Kinect for 13 years. How long are they supposed to let a product run? It was a cool tech solution in search of a problem.
You're glossing over a big part of the story. It is hard, really, really hard, to convince game developers and publishers to make games that require an optional accessory. It's been tried again and again and it is never more than a mild success and usually an abject failure. They want to target the base platform, which will always have a dramatically larger install base. Thr original Kinect was just such an optional…
The Xbox One was then tightly integrated with the Kinect, but that was such an unpopular move that they eventually gave up (first by no longer requiring the Kinect to be connected [1], then by no longer shipping a Kinect with each Xbox [2]) - so it's not for lack of trying. The thing was just unpopular with Xbox users.
...also as an Xbox 360 user at that time I saw Kinect as an expensive toy, and the completely brainless Xbox One marketing (which made very obvious that I'm not their target audience) was one of the main reasons why I gave up on the Xbox and went back to PC gaming.
[1] https://www.theverge.com/2013/8/12/4615586/xbox-one-no-longe...
[2] https://kotaku.com/microsoft-announces-xbox-one-without-kine...