I know of very few people who take out IO loans for their PPOR, and I don't know of any banks lending 100% of the valuation of a property, unless cross-collateralised against a portfolio of property with an overall max LVR of something around 80%.
I don't see a problem with Australian lending - indeed that's one of the reasons why we didn't get ourselves in such a mess like the US did ... we have relatively few risky residential mortgages handed out by the banks.
"The Reserve Bank paper, co-written by the head of its financial stability department, Luci Ellis"
That's not much different to an IT security person telling you that the best way to secure your computer is to disable all networking and USB ports etc. No data in or out = no hackers. Sure, it's effective - but a bit of overkill and introduces problems with flexibility and manageability.
I can tell you an even better way to avoid loan risks. No loans. Simple!