The objection is less about the discussion of social issues and more about the agenda that comes with that discussion. Two sides taking entrenched positions isn't a discussion. And the introduction of a men's rights activist is going to be met with the same suspicion of an entrenched position as a guest on the podcast who uses terms like "cis gendered male." Which is widely regarded as a slur.
Agendas aren't healthy and result only in extremist communities like tumblr and 4chan, who are more alike than different in their degree of polarization.