«وكلّ من الضمير والواو صالح للربط»
Each of the pronoun and wāw can serve as a linking device.
A pronoun refers back to the bearer of the circumstance from inside the second clause. Circumstantial wāw connects the entire following clause to the preceding event as its attendant state. Their contributions are not identical, even though the two may occur together.
A wāw introducing a ḥāl should not automatically be read as ordinary coordination between two independent propositions.