Biggest benefit...
...to food security would be if we could find a way to fix greed, both human and corporate. There is plenty of food to go around, the problem is the "going around" part. So while better data is going to help, it will only matter if it is applied to the right problem, i.e. getting food to everybody who needs it as a matter of human rights, rather than maximizing the profits of large multinational companies.
We can look for profit elsewhere; at this point in our civilization we should be treating food, shelter, and clean water as common entitlements