I really hope you know that there are still long term effects even if people don't die. People could get Covid-19 but not die; they would probably still have a lot of trouble breathing.
Even if it was just "either you're perfectly fine, or you die," then, without lockdowns (that ARE effective btw), the whole world would get it, and (since 99.8% of people survive) roughly 15.4 million people would die. Do you want 15.4 million people to die?