666, on the one hand, you're acknowledging that treasure lore is a dime a dozen, and that there's alternate explanations to why the stories aren't true. Yet on the other hand, you keep going back to believing your particular pursuit is a true treasure. Could it be that yours too is just another example of telephone game ?
As for the treasures you say have been recovered, let me shine a light on that:
SO TOO did I hear of "recoveries" by other people, when I got ready to go to Mexico on a treasure hunt (Mexico is another country that is steeped in treasure lores and stories). My host had several stories of recoveries. So, like you, I'm thinking "How can anyone argue with that !!?? Let's go !! Certainly there can be more then !!"
Then once we got down to these high-mountain villages of the Sierra Madres, and once we began to find zilch, I began to ask more questions:
Like before we had left the USA, my host had told of coins recovered by a particular friend or relative of his , in the village we were now at. So eventually , since I was curious to see the coins, I asked my host to please introduce me to the "guy who found some coins". Eventually, we tracked the guy down. WELL GUESS WHAT ?? Turns out he didn't actually find the coins himself. But rather, he knew the guy who found them. Ok, no problem, so I ask this person "Can you please introduce me to that person?". After much reminding and persistence, I finally get introduced to the other person. WELL GUESS WHAT ?? Turns out that they too weren't the ones who actually found the coins either

But not to worry, as they got it on reliable source from their cousin. And so you track down that cousin. BUT GUESS WHAT ? They too never actually saw the coins. But not to worry, because they heard it on good authority from someone else.
AND SO ON, AND SO FORTH to perpetual regression. Very quickly I realized that there was never actually any coins, and that this is all a camp-fire story gone awry. But notice how NO MATTER HOW MANY HANDS THE STORY PASSES THROUGH, that the end person still considers it "first hand info".
So too do I suspect is going on with the recovery stories you hear in the Philippines.