No, dynamic type systems are not inherently more open
There is a battle between static and dynamic typing in the programming world, and the battle will likely always be there so long as humans write code. I maintain that both dynamic and static types have their place. This article pushes against one particular argument used for why dynamic types are better in systems where types are unknown.
This is probably one of the most succinct explanations of what a Software Architect does and what they should likely know and understand, This is the role I am currently filling and I foresee myself referring back to this frequently.