I think you are still not fully informed on Sweden. You think they had no "lockdown", no recommendations to their public at all. Not the case.
Sweden also had 2000 citizens in Iran, about 50,000 in total abroad that had to return.
Not unlike the US in this respect.
Much of the international coverage was neutral, but some of it also contained criticism,[196] and in some cases was accused of being "fake news".[197] Many foreign news outlets described Sweden as pursuing a herd immunity strategy,[196] including US president Donald Trump, who in a press briefing told the assembled media that Sweden was 'suffering very greatly' due to what he referred to as 'the herd', and that the US, if it had not taken much stricter social distancing measures, 'would have lost hundreds of thousands more people'.[198][199] Responding partly to Trump's remarks, which she described by using the word ‘misinformation’, Swedish foreign minister Ann Linde said that the ‘so-called Swedish strategy’ was one of many myths about Sweden, and described it as ‘absolutely false’. Linde said that the Swedish goal was no different from most other countries; to save lives, hinder the spread of the virus and make the situation manageable for the health system.
It's been overblown - and you - led by the nose. NUMBERS need to be compared with what may have occurred had a different path been taken - not to neighbors numbers.
Bringing travelers home - and dealing with them upon return - may be your bugaboo (as it is in the US). Maybe Sweden could have done better in this respect. But as with the US, how this virus spreads was not fully known at the time travelers were returning.