Throughout Europe and the US, the information is available, and the logistical infrastructure to provide targeted care and preventative measures for the elderly and people with known health conditions. I do not see why a more focused strategy cannot be implemented in these countries that could protect the most vulnerable groups from infection, while still allowing the society to function.
Yes, total lockdown worked in China to decrease the spread of #coronavirus; heavy-handed measures often do work, but that does not make them the best measures. You can kill a rat in your home by blowing up the house, but you could also find ways to kill the rat that would leave your house intact.
The fact that there appears to be no exploration of more practical, less societally damaging approaches to the virus, when such options are certainly plausible, suggests to me that policy makers are actually more interested in achieving the damage predictably caused by lockdowns than they are in public health.