While such "reassurance" may, indeed, be helpful, it would be conceptually inappropriate and impossible for any Web Browser creator to make one.
This would be analogous to Microsoft making "assurances" regarding the Internet Explorer (and all the potential web sites that its users browse) or the Mozilla Foundation regarding Firefox.
I think everyone would appreciate less focus on the losing argument and more focus on resolving the holes in KVS that didn't exist when they paid for it, namely fares and availability.
But to your analogy, KVS has a very small fixed set of inputs (predefined "methods", dates, airlines, IATA cities, etc). So the output and scope of KVS is indeed finite and fixed, thus making it neither inappropriate nor impossible to provide details on that small space which is 100% controlled by the programmer.