Until very recently, there was no evidence to support your assumption of “Most don’t show any symptoms”.
If the much higher infection rate proves true; that’s good news. Very good news. But, you didn’t know that before anyone else.
When the decisions were made to use extreme measures to control the spread; all the evidence pointed toward a much higher death/case ratio.
The herd immunity solution may work (if the estimates mentioned in the article prove correct), and that would be great news. However, if the death rate is higher, that would mean that many more people would have had to die to achieve herd immunity.
I know all of that, the experts know all of that, and Trump knows all of that. Trump took decisive action, based on the best information available at the time. That’s what effective leaders do. Your Monday-morning quarterbacking isn’t impressive. And your callous attitude to the deaths is more than a little disturbing.
The death rate being higher at a given time doesn’t necessarily mean more total deaths over the span of the pandemic. You only get more total deaths if the death rate is so high that it causes the healthcare system to be overwhelmed, which hasn’t happened in Sweden and seems unlikely to happen. If the system isn’t overwhelmed, then the death rate only changes how the deaths are distributed over time, not the total number. Sweden’s strategy will result in more deaths early on but fewer later, a wash. And they will have done this without shutting down their economy.