Im curious if there have been any blind studies that show this. I think a lot of what is conventional wisdom when it comes to taste in the wine industry is often not reproducible in the lab: https://www.theguardian.com/lifeandstyle/2013/jun/23/wine-ta...
Its tough to taste a $10 wine and a $100 wine blind and say "oh this one is much better than this other one". But it's easy to taste a wine and say "this is earthy" or "this is fruity" or "this is peppery". Earthier wines tend to be from grapes that are in more mineral present soil. Have you been wine tasting in a major region before? It's actually a fantastic experience. There's so much complexity in wine flavor.