I get where you're coming from, but the Xbox One had a lot more issues with it than built-in Kinect. The always online requirement, for one, was a bigger issue.
And really, when it comes down to it, Xbox One did fine. It was never beating out the PS4. In retrospect, the 360 was an outlier because Sony fukked up the PS3's initial reveal, its pricing, and its architecture and 360 did pretty much everything right outside of the RROD issues. If you believe that Xbox brand had a chance to take down Playstation brand and fukked it up, I get why you would feel differently, but I just don't think that was really going to happen.