Whenever someone starts making an argument about 'the ecumenical councils', might want to ask them:
How many are there?
Oriental Orthodox: "3, tyvm! Now we're outta this crazy house!"
Anglicans: "4. No wait, 5. Maybe 6?"
Eastern Orthodox: "7. Duh!"
Roman Catholic: "21. Why stop? Probably 22 next time you ask!"
Similar to the term 'the church fathers', when you look closely, you see there's no consensus on what the data set is.
There is a misplaced sense of concreteness to these terms.