E.g. "Employees that might be suffering burnout and need attention"
Which I can see for both PR optics and product reasons. If they retain the secret sauce and raw data, it makes it more difficult for others to go over-the-top and compete.
Do you think Microsoft will prevent their paying customers (the companies) from querying, "What is the strongest legal reason to fire <person> based on the past three years of activity on this computer?"
Their sales team would be absolute fools not to point out how much easier it makes it for a manager to see historically whether someone is performing tasks as they are specified in some formal handbook.
The difference between doing that for reasonable reasons and doing that for post-hoc justification of targeted reprisals is in the mind of the manager and nowhere else. Maybe unspoken, but incredibly obvious.
"Give me the man and I will give you the case against him."