If you see data structures as cyclic, it is not "in large part due to laziness", but _only_ due to laziness. If you look at the memory representation I think (but I am not sure) there will be no cycles between allocated objects. Only a thunk.
Using strict data types, I think you agree that cycles can not be created. Non strict data structures I agree can be seen as cyclic, but I prefer seeing them as infinite.
Using strict data types, I think you agree that cycles can not be created. Non strict data structures I agree can be seen as cyclic, but I prefer seeing them as infinite.