What strength is there in being able to resist COVID-19 specifically, which is just one arbitrary sickness out of many that can still arise? One that didn‘t eve

What strength is there in being able to resist COVID-19 specifically, which is just one arbitrary sickness out of many that can still arise? One that didn‘t even exist until recently? Strength and weakness are completely dependent on the environment and we are shaping that environment, for example by vaccinating.