the real question is why! it is like saying from tomorrow i will use a tank to drive to work instead of using my car. in order to trade sugar in a centralized place there is no need for smart contracts or even blockchain, it can be done a lot easier and more efficiently with traditional ways similar to how you would trade stocks for example. i honestly don't see the benefit of blockchain here.
Just like what we have seen in the last couple of years, companies, mid-to-big, are really at blockchain's hype train. I don't know if they really do some feasible study before implementing blockchain technology here because as you have said, they might not need it. Perhaps just a simply centralised database will do to track everything.
Anyways, I do hope that it will make their business operations more robust with their blockchain implementation, otherwise they're just wasting money here, IMHO.