No true Scottsman fallacy. I have Catholic relatives who believe in and practice abortion. They have not been excommunicated. They openly advocate communism and radical feminism, even to the extent of identifying Mary as the co-redemptrix with Christ as an expression of that feminism. They regard Paul as a cranky old misogynist without authority in their lives. And they are Catholics in good standing with the Church, and will remain so, in practice, until the Church disciplines them. I'm not holding my breath. They are not the outliers in their context. Us cranky Bible-thumpers are the outliers.
Peace,
SR
actually it is automatic, there is no need for a formal declaration.