I know that we should use Present Simple when we talk about things in general and Present Continuous when we talk about something incomplete that is happening around time of speaking. I also know that we can use Present Continuous even when we talk about very long periods of time like in the following sentence:
Kate wants to work in Italy, so she’s learning Italian.
Now lets consider this sentence:
Our children go to the same school.
I see that people don't use Present Continuous in sentences like the one above. Why? In this sentence we talk about long yet quite definite period of time (for example, they started going to the same school 3 years ago and will finish going to it in another 7 years because they will graduate the school). Please explain why, despite this reasoning, people still prefer to use Present Simple in the last example.