He's also speaking as an employee who is uncomfortable with the current state of Google. Do workers rights include the right to not be constantly bombarded with political messaging you don't agree with and to be intimidated into keeping your own opinions silent?
This poster's message and the internal dialog that came out during the Damore hearing make Google sound like a horrible place to work that is aggressively overly politicized. So yeah, the stock holders would benefit from this but so would the employees.