Isn't it your immune system that causes the issues that lead to serious complications or death just like the 1918 flu pandemic? Basically the virus does it's thing and after about a week to 10 days, you either recover or get seriously ill, correct? So, the vaccines basically allow your immune system to recognize Covid as something it's seen before which allows your immune system to be more prepared for it as opposed to completely caught off guard. This makes sense as to why most vaccinated people don't get seriously ill from it. The same thing should eventually occur naturally as the virus burns through the population. It won't go away but it'll just be another virus that causes cold symptoms. Unfortunately, it would seem to me that measures to curb the transmission of the virus is just delaying the ability for it to burn through the population and become endemic.