Cwik and Mandal then examine how actual, data-driven science could inform policies rather than one-size-fits-none lockdowns. As they show, there's no evidence that lockdowns even work. There is plenty of evidence that lockdowns take people's rights.
The reason we had the "highest one-day number of cases" was because we had the highest one-day number of tests, the highest by far. At 26,358 tests, it was over twice the previous testing high (13,042 on May 21, for which 778 returned positive).