You understand that in those chats, Micay had been the victim of ongoing harassment, perpetuated by Rossman and Calyx leadership, which culminated in doxxing and then a SWAT attack which is a threat on their life.
They didn't lie about stepping down. They took a back seat to development work and the public eye because of these experiences. It was an enormous toll on their mental and physical health.
Now does that excuse Rossman for mislabeling na individual with mental diagnoses? Does that excuse them and other people for dismissing what they say based on these false labels?
Tracker blocking uses flawed heuristics. The only methods that are typically used are static lists which is just badness enumeration. There is nothing stopping the app/service from sending the data down a different domain that isn't blocked or a domain that can't be blocked without breaking the service.
Adding to that, how do we even decide what is a "tracker"? What is the definition? Some might say it includes all telemetry or crashlytics. Are those inherently malicious?
I don't think it would make sense for GrapheneOS to include something flawed like a "tracker blocker" that lulls people into a false sense of security. They use robust and meaningful methods for improving the privacy and security of the OS.