I think it's more nuanced than that.
There's ethically right and wrong, selerated by a gray area. 
There's a difference between optimizing for generating value and optimizing for being addictive. 
There's a difference between using and selling behavioural data.
Inform the user or not?
Optional or mandatory? 
Opt-in or opt-out?
All to say in-app analytics can be done right, though the largest companies do not.