This is one of the ongoing debates on this forum – do strata committees and strata managers with delegated powers have a responsibility to enforce their blocks’ by-laws.
My view is that they do but it’s not presumptive – they won’t get into trouble for not doing it.
However, owners can take the committee to NCAT on a Section 232 complaint for failure to fulfil their responsibilities, and that can lead to Tribunal Orders – and they will get into trouble for ignoring them
Or you personally can just take a complaint against your neighbours about the specific by-law breaches to Fair Trading for mediation, and then to NCAT for orders.