The problem with not defining boundaries and instead relying on some fuzzy notion of understanding the subtext is that it leads to confusion. The James Damore fiasco demonstrates this. They guy actually thought he could write an opinion on a highly controversial and inflammatory topic without repercussions. Why did he think that? The vast majority of HR departments would explicitly discourage it and the company culture (especially at a multinational) would make it clear this isn't a topic for the corporate intranet. But he was confused enough that he thought this was ok because he probably though Google is different and is OK with employees debating political and social positions on company boards. That's what I mean by 'Google encouraged it'.