If the virus is under better containment, those more likely to be infected, are more likely to be comorbid with other conditions. Thus death rates when looking at the entire length of the pandemic are likely to be higher.
Delta is the first time Australia has seen widespread infection in healthy people.
> those more likely to be infected, are more likely to be comorbid with other conditions
I'm not totally sure that's the case - it's at least something you can't just aver as self-evident. I'd guess that those most likely to be infected early on are going to be people who travel or those who come most into contact with them (service & tourism workers).
But I also think it's a moot point. In the context of this thread - which is about how to move forward once we've accepted that containment is off the table, and especially about the risk that poses to the healthiest members of society (kids) - it doesn't make sense to cite numbers that you yourself acknowledge overstate the risk of COVID by being biased towards the most unhealthy members of society.
Delta is the first time Australia has seen widespread infection in healthy people.