Ultimately, if the people at the company have to do a job, they have to communicate somewhat, and putting it on an email or another recorded medium is the best way to prevent endless meetings and have the perspective documented in a single place.
Everything has a legal liability, it doesn't mean that it's worth it to move everything to an undocumented medium.
Everything has a legal liability, it doesn't mean that it's worth it to move everything to an undocumented medium.