This has been an interesting process. A lot of decisions had to be made on limited information. At first we thought the virus was going to be worse than it was, or a lot of people did anyway. And the first versions were probably more virulent. Over time it seems to have weakened a bit, and we have learned better how to treat it.
At this point rather than criticizing people and governments for the decisions made I think we should look at what we can learn from the experience. We can be sure more pandemics will happen, and some will be worse, one day much worse than covid. And some that will not be so bad. Better understanding the lessons learned will help us better plan for the next one.
I don't think so, however the fact that you and many others, smart reasonable people, worry about it is a sign that the whole thing was not handled very well. Plenty of others...
I think Canada suffered economically for their decisions, and it created many personal hardships. For example a lot of Canadians have snowbird homes in the US, and a lot of Americans have summer places in Canada in 2021 it was impossible for most of these people to use, or maintain, their own homes. And I know the fishing charter people I went out with in Canada lost a lot of income in 2021 because many of their American clients could not travel. I would not want to second guess Canadian decisions, its not my country, but I would hope people are looking at things like this objectively for the lessons learned.
We might feel better if there were accountability for these errors of judgement.