Can you cite that 30% number? That doesn't seem correct at all given the actual case count. It would correspond to a asymptommatic undercount of a factor of two hundred, which isn't supported anywhere. Even the Stanford study only guessed up to 60x or whatever.
Note that if Sweden were really approaching herd immunity new infection rates would be dropping, and in fact Sweden's outbreak is still growing. This at a time when it's objective size is very significantly larger than its neighbors' (who are dropping).
> The media that wants to paint this strategy as terrible
Are you sure it's the media's desires that are coloring interpretation? I mean, objectively Sweden's outbreak is the worst in northern Europe, and it's growing faster than pretty much anyone else on the continent. That's not consistent with "herd immunity".