I agree conditionally, since there isn't one kind of "divisive" topic. Some kinds should be avoided, which are the ones people usually are talking about when they say politics should be avoided the workplace. The main thing that comes from them are disruption, polarization, and nasty feelings. Other kinds, like ones that are "divisive" between workers and owners, should be tolerated or even encouraged, since they are appropriate to the context and can lead to genuine improvement within it.