We are real bad at connecting dots that take more than a few years to happen. So many other things happen to us every day. Even if some bad action doubles your odds of a certain outcome.. that means it is still 50/50 if the original thing "caused" your bad outcome.
The VA also claimed he was never exposed because he wasn't in one of the units they claim were exposed, that's the other game they play. He was in a mobile unit that was sent to various places in theater, so the government doesn't have the documentation of where they actually were, but claims they know he wasn't exposed. He told me first hand he woke up one morning and the jungle outside the base was completely gone.
We don't know what agent orange did to people. Agent orange wasn't even the only defoliant used. How much of it was stored improperly? How much of it was contaminated during manufacturing with other compounds?
Fortunately, we still use 2,4-D, half the mix of agent orange, so we all get to find out first hand.
https://www.publichealth.va.gov/exposures/publications/agent...
Of course, I haven't even broached the moral obligation the American public has to men they send to war...
Looks like you have a bright future in claims adjustment! ;-)