Of course you can list arguments for discussion as a teaching tool. Fr. Hunwicke says as a teacher he would be a sort of actor, impersonating someone with certain views, like what good debaters do, presenting the other side's position fairly, in terms the other side agrees with, before taking it apart. Mid-term he would "switch sides" and present the opposing view!
Fr. Bourgeois wasn't warned for having an academic discussion; to imply that is to buy into Black Legend nonsense about the church. He served at liturgies with ex-Catholic women ordained by independent churches claiming to be Catholic. An act of schism and simulating a sacrament: take your pick for the reasons for excommunication.
The church doesn't excommunicate as a knee-jerk reaction to questionable views. Fr. Pani should be warned and if he persists, thrown out.
The archbishop of the former state church of one of the world's most irreligious countries is now a woman. Have the congregations returned?