Can't one solve the problem of tracking food contamination with a simple key value store that tracks supplier id and the food batch information? Whats the advantage of using blockchain here?
It's about tracking all steps, all parts that were used, whether all companies involved in the processing chain had appropriate ISO certificates, if sourcing didn't originate from sanctioned countries or countries with bad working practices etc. in order to "select" ones that fulfill given criteria, possibly marketing them in multiple layers with certificates (this one is pure Swiss, cows were fed grass 100% from Glarus canton, operated 100% German machinery, food assembled by a Dutch factory implementing ISO blahblah, so here you pay 175% price; or you can get a budget version containing traces of ground fingers of children from Uganda forced to work in a processing factory with high contamination of environment etc.)
