This is why people tend to roll their eyes at the WSJ opinion section. (The journalism side, to be clear, is top-notch.)
Obviously the internment of Japanese folks during WWII was far more intrusive than the COVID restrictions. But that doesn't contradict the statement--they didn't say "the harshest restrictions" or "the most egregious restrictions", they said "the most sweeping restrictions". The word sweeping is an adjective meaning 'wide in range or effect'. It is simply a matter of fact that the COVID restrictions, which affected ~40 million people and resulted in the closure of 40,000 businesses, were a more sweeping restriction on liberty than the internment of 120,000 Japanese during the War.
The only comparably broad measure you've listed is wartime rationing. But the fact that wartime rationing was as broad in scope as the COVID restrictions hardly renders the WSJ's claim absurd.
The Sedition Acts variably restricted the First Amendment rights to criticize the government of anyone in the country.
How are these not broad?
Is it possible that you, like the WSG, enganged in a bit of hyperbole to tru to make a point?
To be clear, I think the WSG claim is hyperbole. However it is a claim that could be reasonably argued to be correct and is thus not literally "absurd". Thus I would class is as hyperbolic and your use of the word as figurative.
https://twitter.com/aclu/status/1009186716593393664
Contrast: https://www.wsj.com/articles/elon-musk-is-our-new-aclu-11589...