No, there is a distinction, unless you intend to 'Gruberize' potential converts using Clintonian meanings of 'is'.
To clarify, dogma that has been proclaimed has not been historically novel. Rather, it has been a long-held belief in the Church, but at the time of proclamation, required clarification. As in the last two cases, they were of great importance, and coincided with events of equal importance.
In the case of the Cardinal’s personal preference, it is of no practical consequence. St. John Paul II’s documents spell that out. Additionally, there is no need to proclaim an all-male priesthood dogmatic.
What a potential convert should see is members of the Church Militant are human, but the Church is divine. The Holy Spirit protects the Church and its members from mere opinion.