Most of the individuals posting aren't Greek or Turkish, difficult to be a nationalist for a country you don't belong to. Again, and I've attempted to explain this in multiple ways, the game doesn't care. There is no "majority" mechanic for provinces. It is either 0% or 100%.
Now, taking into account that a province can only be 100% of a certain culture, I would love to hear ANY rational argument for the status quo (100% Turkish) rather than the solution suggested which would result in the region being 88% Turkish. Provinces can only have a single culture. The region as a whole though can have a mixed culture. So why not?
Trabzon is part of modern day Turkey, why to people exclude that in calculations? As for the argument for keeping the status quo, Anatolia was a very stable region for the Turks, while most of the other regions experienced rebellions every once in a while, Anatolian Rebellions were exceptionally rare, and adding in a greek culture with nationalist tendencies (aka might rebel and form its own country) is a falsehood as at the very least there would need to be an independent powerful Greek kingdom for that to happen. Anatolia should be a stable region for the Turks with little to no risk of rebellion even under high war exhaustion, as was historical. While it might not have been Turkish speaking, it was turkish loyal, and that is what mattered.