It isn’t heretical that God provides a human spirit to His believers.
Why substitute God’s action with religious worldly institutional intervention?
Even Matthias wasn’t properly established as an Apostle by the same methods of the recent Conclave.
It is heresy to follow Core and assert that there is no need for a priesthood.
It is heresy to deny words directly from the mouth of Christ Himself.
It is heresy to deny that Christ Himself founded a visible Church to be a light on a hill, not something invisible and therefore much worse than a candle under a bushel basket.
have a nice day