Another article (1) quotes the Chief Inspector as saying: "If anyone uses such an object to attack a person, it could also be deemed an offensive weapon" but no mention of such an attack in this specific case.
Can anyone supplement my (long-ago) grade 11 law class: is mens rea alone isn't enough to be convicted of a crime?
(1) https://www.scmp.com/news/hong-kong/law-and-crime/article/30...
Of course a purely functional improvement to governance is a political nonstarter in today’s environment.