Some app developers are going to be better at respecting privacy than Google, while some are going to be worse. The problem arises when you have to assess each one: people either won't or run the risk of relying upon misinformation.

The kind of analytics data a typical telemetry system will collect is pretty benign in isolation. It only becomes a risk when it's in the hand of an adversary with a global view of the internet, such as Google, Facebook or large-scale analytics providers such as Mixpanel (as their libraries are integrated everywhere and they have a ton of traffic they can use to correlate and deanonymize users).