"we ran 125 million barrels of oil through the Strait" is a classic "large number dummy" trick because under normal circumstances, 20 million barrels passed through the Strait of Hormuz every single day. "we've gotten 125 million barrels through" actually means transport has slowed to a trickle.
yet we decided that only the territory controlled by the government in Western Germany was covered by Article 5.
We could do exactly the same with Ukraine and say: “You join NATO and Article 5 only covers that part of Ukraine controlled by the government in Kyiv.”