If someone drowns in the ocean, they don’t think it was because there was a lifeguard there. The lifeguard was there because it was an area with a high risk of people drowning.
If there’s a leak of nuclear material around the Chernobyl Power Plant, which happens to contain nuclear material, you don’t suspect that maybe that nuclear material came from the nuclear power plant? You don’t think there’s a possibility an accident may have occurred?
If someone drowns in the ocean, they don’t think it was because there was a lifeguard there. The lifeguard was there because it was an area with a high risk of people drowning.
If there’s a leak of nuclear material around the Chernobyl Power Plant, which happens to contain nuclear material, you don’t suspect that maybe that nuclear material came from the nuclear power plant? You don’t think there’s a possibility an accident may have occurred?
Nuclear material is not naturally occurring. Viruses are.