The CoA will publish their reasoning next week.
I agree that it's an important issue that needs to be discussed, but not at this time. What makes the protest even worse is, the audience it's aimed at helping are more than twice as likely to die from respiratory diseases than non-indigenous people.
Add in the evidence we've seen from other countries that diabetics and those with heart disease have a higher mortality rate with this virus, which are huge problems with the indigenous population. Perhaps we'll be lucky with so few cases of COVID that these protests won't be as problematic as we think.
Looking at the sheer numbers that turned out, other than bringing the army in, there's not much the police could have done other than to help minimise the impact (i.e. Qld Police were providing masks to the public). The Police have also fined the organisers up here with a failure to keep social distance, which is probably as much as you could reasonably expect them to do.
For Qld at least, the Anti-Lockdown/5G/Vaccers were treated the same way that the BLM protesters were. So those complaining about consistency can put their pitchforks down.