You are completely right. Many companies seeking skilled labour did not close during the COVID-19 pandemic. They remained active. However, as Mr. Gagnon and Mr. Milliard said earlier, the available positions don't necessarily match up with unemployed people. Saying that all LMIA applications must be refused when the unemployment rate is high is akin to taking an intellectual shortcut. It would be equivalent to disregarding the reality on the ground. A high unemployment rate does not create more skilled staff for the available positions.
On April 21st, 2021. See this statement in context.