I said that we should take actions that have been shown to improve the situation. 8canwait.org goes over many of them, and I'm sure there are lots of other actions we can take as well.
Zero is impossible without a perfect populous. It is the enemy of 8canwait (and I know, it was created by people who think zero is possible).
Someone saying "zero is possible" makes it seem like they don't understand the situation enough to have a real conversation about it.