why anyone thinks "open letters" and petitions to a trillion-dollar company will get them to change their mind is beyond me
Because the company either has to address it, or stop pretending it's "listening to concerns" or whatever. Even if it doesn't change the outcome, it makes it clearer that the company is engaging in bad faith.
It's something apps that will soon break can point their users to so they know to blame Google and a bunch of incompetent governments.
Google will not change their minds, they're too busy buying goodwill from governments by playing along. There aren't any real alternatives to Android that are less closed off and they know it.
It matters to me because I'm reading it now and feel more informed about this problem. Throwing the towel in and saying it's all pointless isn't helpful.