I'm not defending or particularly interested in the outage. If their service is unsatisfactory, leave them. That's business and they probably deserve it.
What I find amazing is that they're being held to a standard that no other private business is held to. I see no fundamental difference between this company offering a service and any other.
Forget tech, compare them to Macca's. Imagine a service outage that meant Macca's couldn't sell you burgers today. You'd shrug and take your business elsewhere.
Optus is getting brought before the government for a "Please explain" and a $12 Million fine. Yes, they own infrastructure. That's my point. It's theirs. They can in theory decide to just stop offering their product tomorrow.
Somehow we have reached a point where enough people totally rely on their service that they face this level of scrutiny when they stuff up.