If you live isolated on an island I could understand, but if you want to use the public spaces like school, hospitals etc then we need to calculate the risks. If technically we could prove who spread a virus then we could give you the option to not vaccinate but if you cause someone else to get infected you pay , then you will actually have to calculate the external risks as it should, people would use the masks if they knew there is a small chance they could be accused and proven guilty of murder.