Even if the rates were very different, the any difference claimed to be caused by specific measures would not necessarily be causal as implied by brimnes. For example, what are risk factors for COVID? Here are some data on obesity: https://www.cdc.gov/nchs/products/databriefs/db56.htm#:~:tex.... What about weather differences? The list goes on.
I can only speculate as to /u/brimnes' point, but there are many ways to measure the effectiveness of different countries' responses to covid. One might be to look at the countries' death rates. By that measure, the US response has been quite a bit worse than Canada's.
Even if the rates were very different, the any difference claimed to be caused by specific measures would not necessarily be causal as implied by brimnes. For example, what are risk factors for COVID? Here are some data on obesity: https://www.cdc.gov/nchs/products/databriefs/db56.htm#:~:tex.... What about weather differences? The list goes on.