Most people in the west
haven’t eaten real mangoes. The US and Europe are just too far away to get access to proper tropical fruit because it spoils so fast. We get the varieties that travel well which are almost universally the worst tasting (fewer sugars for bacteria to eat and more fiber and cellulose filler). So ironically, yeah, synthetic flavors are sometimes the only place we get certain flavors - like the artificial banana flavor that’s based on the Gros Michel that preceded the cavendish.
Here in the US, due to industrialization, I struggle to find good fruit and vegetables in general, let alone tropical. They’re all picked too soon, travel too far, and have barely any flavor compared to home grown - and I’m in California! There’s a few specialized tropical fruit growers in Florida but it’s not even legal to ship much of that stuff here