Just do the right thing, it can save lives of other people. Providing the correct details will help the NSW Health to facilitate contact tracing thereby helping prevent the spread of the virus, and possibly saving lives.
No one is stopping us from punting, NSW Health are only asking help from us prevent the spread of the virus.
Besides, it is not a recommendation anymore, as seen from the NSW Health, it is mandatory now until further notice. I also heard yesterday from my source that they will probably do spot checks, they have already at the casino, and few other venues. Business will face fine and charges, as well as individuals who were proven to intentionally provide false information disregarding public health, and most likely be charge with perjury.