"Lockdowns aren’t a public health policy. They signify a failure of public health policy"
I agree with this. In fact, if anything it was being said a lot more at the start of the pandemic than it is said now. I also think he asks a good question wrt Sweden's approach. How much of the heavy lifting of controlling spread is done by relatively 'light', mainly voluntary measures such as those used in Sweden, how much more gain is there to be had from heavier measures, and how does that gain match up to the costs involved (I don't mean money costs)?
Sweden has been all over the news when its cases have been high, and nowhere near the news when its cases have been low - lowest cases and deaths of any country in Europe for large chunks of the last three months, for instance, and doing very well for most of 2021 both in terms of covid deaths and, importantly, excess deaths.
This link gives a list of countries' excess deaths over the course of the pandemic. Sweden comes out of it all comparatively rather well, and Sweden still made its share of mistakes, including not protecting people in care homes. So in the sense that this person is advocating something like what Sweden did but without some of the mistakes that Sweden made, certainly it is a view with some real-life substance on its side.