So the billionaire in Inferno leaves a crumb trail all the way to the inferno virus so his followers can find it e.g. Siena. And Siena even says she's going to protect the virus to ensure it goes off because people are looking for it. However, the people looking for it are only able to find it, as is Siena, because of the trail Zobrist left.
Why did he leave a crumb trail? It doesn't make sense. Nobody would have found it if he didn't. Just time the device to go off. Most likely, the WHO characters in the film wouldn't have even known without the Faraday pointer...
Am I missing something?