I received an email today from Audax Australia with some details about rides being opened up again in Victoria. The pith of the missive is shown below.

To the eagle-eyed reader, the exclusion of the unvaccinated from certain rides will be noted. Plus, such exclusion has been made for two reasons: increasing participation rates and safety.
I may be able to clarify the rationale if I get a response from Audax to my two questions: on what basis did the Committee determine that banning the unvaccinated will increase participation and on what basis will it increase the safety of riders and families?
I’m expecting a response soon. It should be a hoot.
I received a response: because “The Science.”