There isn’t any probability this country would stop a wave of infection though - we’ve seen that four times now. If you believe that this kills people, “just letting it spread“ will always produce bad outcomes if you model what happens when the spread is uninterrupted.
Of course if we did have effective track, trace, isolation and containment then you really could model what effect that would have. However for some unfathomable reason the opponents of lockdowns don’t want that and would rather have the alternative (lockdowns).