It bothers me as well.
I can think of several explanations. First, not all that many people know what the original Flambeau Red really looked like. It is a long time since the last Flambeau Red tractor left the factory
Second, anything close to the the original paint is hard to find, at least here in Australia. The 'Case dealers' here are almost all originally IH dealers. They stock and seem to like to sell 'Power Red'. Some paint dealers will try to mix the right colour, but it is fairly much a hit and miss process. I have thought about trying to import some, but that is a really difficult process.