There is a naive bravery here. Regardless of the merits, I don't understand what the upshot of stating such a mission is. This statement is going to make the execution even more difficult.
Companies have a social responsibility that goes beyond product, consumer, and shareholder. They have extra-legal responsibilities that arise due to the extra-legal impacts they have upon our lives. Hating the player or the game is a false choice. It's wise for companies to tread lightly outside their scope of operations, however, there are times when being agnostic does not have the intended effect.
I feel it would be unlikely that a non-white non-male CEO would write this. This statement feels like the well-intended product of a bubble.
I don't know if Brian Armstrong's statement can be taken completely at face value given some recent criticism he encountered by not advocating for BLM, and then eventually doing so under some duress. So maybe an element of this stance is him avoiding future issues by saying "I only want to deal with these issues on my terms in future, if you don't agree with that then heres a bag of cash and theres the door". Now, whatever Coinbases prerogatives/biases happen to be, I do believe that a working environment mostly free of political activism and social value signalling is one that will resonate with most people. The reaction in many of the technical groups (NOT Twitter) has been pretty positive on the statement from what I have seen.
I thought the sports team analogy was a particularly bad one, given that the current social justice movement dealing with precisely these issues was spearheaded by professional sports team players, and there isn't a single championship team that doesn't have players (employees) putting this at the front and center, to the point of actually disrupting business if they have to. While still working together winning rings. Like...why did you compare your ideal culture as it relates to social justice, to orgs that could not possibly be more philosophically opposed to your own, saying you want to be like them? I get what he was going for, but the whole thing felt like a self-own. It's messy and hard, but it's important to people (aka employees), and socially responsible stances by corporations are as old as dirt.