I don't see this press release as forbidding debate. This is simply saying that the company won't be taking a stance. That shouldn't stop individual employees discussing political topics as long as they can act like adults and not create a hostile environment.
I read the original post from Brian as; you can, but at work one should work. Coinbase isn't paying folks to debate politics, they're paying someone to further the company mission.
this is undoubtedly true, but also undoubtedly easier said than done. we don't seem to be wired as a species to have difficult conversations without feeling emotions amd having those emotions affect our relationships.