Taking stock of the connected devices and software that I am familiar with, I'd say there is a strong correlation between detailed user tracking and worse UX. It seems weird at first glance but I think there are some solid explanations for why that might be.
Data analysis is difficult to perform and understand well. It is easy to draw mistaken conclusions or to twist results to show the conclusion a person wants, and using detailed numbers can lead to a false sense of confidence in the results.
Companies are first and foremost optimizing for their benefit, not the user. Detailed tracking can uncover interesting ways for a company to make more money at the expense of the user.
Data analysis is difficult to perform and understand well. It is easy to draw mistaken conclusions or to twist results to show the conclusion a person wants, and using detailed numbers can lead to a false sense of confidence in the results.
Companies are first and foremost optimizing for their benefit, not the user. Detailed tracking can uncover interesting ways for a company to make more money at the expense of the user.