I don't agree. What you are saying is that e.g. Australia will eventually have the same death toll as us, which is clearly untrue. By keeping cases so low for so long, they have missed a whole load of the pandemic while the rest of us worked out treatments and vaccines and mitigations.
Even in a much smaller way, thinking of my particular elderly relatives - if they catch Omicron in 2 weeks time, their local hospital will have no capacity. They will receive worse treatment at all points from ambulance to ICU, and are much more likely to die.
In 20 weeks time a) they may not catch it, because they will be able to meet others outside, b) their local hospital will have capacity, c) if numbers are spread out, there will be more doctors and nurses working, d) the variants may have mutated further to be even more mild, and treatment will have moved on further.
I'd absolutely take them catching it in May not January, thanks.