No statements means no locals, which is sometimes bad for clarity and/or performance. Functional langs without statements have let-bindings.
>>> (lambda a, b=2:
... print(a, a, b, b, c:=3, c, *[[d,d] for d in [4]][0])
... )(1)
1 1 2 2 3 3 4 4
That's four different ways to get locals with no statements.