Because there are literally a thousand things that are more likely in your daily life to kill you than this virus. Because there are now three very helpful therapeutics against it. Because as the virus evolves it is reverting to its wild, not very dqngerous state. Because no matter what you do, how good your genes are, how much luck you have, eventually you will die of something and if you choose to spend your mortal days cowering under the bed, you will waste that finite time.