So your points are logical and consistent with our actual observations. Without being able to explain how these things work flat earthers can not expect thoughtful people like your good self to accept the possibility that the earth is flat. So I completely understand where you are coming from. And the only working model we have at the moment. Because this globe earth model, it is a very good explanation of our observations. However, it would seem to me, that if this is the case, it is purposely created illusion.
Still it is possible there is some system that could produce the things we observe in the sky, even if we are on a flat plane.
Flat earthers don’t have good answers to these questions, globe earthers do have good answers.