1) it is not an 'it', each culture and each person has their own set of beliefs they think of as common sense.Perhaps so, but it's the best thing we have here, because:
2) but solipsism has the parsimony advantage. Theists face parsimony and OR based arguments ALL THE TIME. But it seems you have another method.The same goes for solipsism.
But there is no reason to assume this you is not determined. It could be like a hologram watching itself unfold. There is no reason a solipsistic self cannot be utterly determined. The entire universe is in the usual scientific way of looking a things. In this case the entire universe is a self.Determinism doesn't hold if solipsism is true, because if it's true there exists only one thing; you.
This notion of control might be illusory. There is no need to assume it, that's for certain. You're mixing apples and bicycles.
It's like saying there is only the self so nothing is seen.
Why?
Because their is just the self and no vision.
No, no. The self includes this visualness.