What you're saying is close to the standard line -- "flatten the curve". By trying to prevent infection, you slow the process down, so that hospitals are not overwhelmed. An overwhelmed medical system means that every aspect is made worse; people are not contained so the spread accelerates, we don't do backtracing with the same effect, medical personnel get infected, people with easily treatable conditions are not treated, etc.
The end state is that almost everyone will be exposed to it, most likely to mutated less deadly variants (because those have higher survivability in viral terms), but if the rate of exposure is slow enough then we can mitigate a disaster.
The end state is that almost everyone will be exposed to it, most likely to mutated less deadly variants (because those have higher survivability in viral terms), but if the rate of exposure is slow enough then we can mitigate a disaster.