It must be that only those professing the true faith can reasonably be considered Catholic. Otherwise, we would be in the position of stating that those who publicly reject the rule of faith nonetheless share in the 'profession of the same faith' with those who do give their submission.
There is a threefold authority in the Church – that of sanctifying, teaching, and governing. Members of the Church must be subject to this threefold authority of Jesus Christ in order to become, and remain, members of the Catholic Church.
Instead of seeking to repair the immense damage done by a failed and quixotic policy to collapse the Russian state, many Western leaders and pundits seek a de facto declaration of war. This, to them, is the only alternative to admitting defeat. Lindsey Graham and Mike Pence favor this.