The scale would determine the difference between nothing, something and everything. So, depending on scale, the difference may be big, or it may be small. You can't just make blanket statements like this. We don't know what the raw numbers of cases without immunization would be, and talking about that is mere speculation. What we do know is highly immunized communities are being hit hard by Omicron. That tells us that immunization does not significantly reduce the spread. So, you are still half right.