Threads that start off addressing the offensive line typically end up being hijacked. And, here we are once again posting about the quarterback position.
So with regards to quarterback throwing tendencies, I think tendencies are a reflection of specific quarterback attributes. After all, an offensive play book is built around the starting quarterback.
In my eyes: Russell Wilson was a read and react ball handler. Russell Wilson threw best to his right. Then best rolling out or throwing cross field to his left. His muscle memory and footwork were already well advanced when he arrived in Seattle. Wilson was poorest at throwing over the middle.
As I recall: Matt Hasselbeck was better as a rhythm and timing ball handler. Matt was most effective throwing to his right. Then second best throwing over the middle of the field. And least effective throwing back to his left.
In my opinion: All offenses tend toward being built around the attributes of specific starting quarterbacks.