Blueberries do smell. I dehydrate them regularly. You have to poke them with a needle. Can’t smell through the skin.
Bad batches smell like soil/rocks and make the house smell like dirt. Not sure why but some batches of blueberry smell just as much like or more like dirt and minerals as something edible, and bland, weak blueberry flavor. Same thing happens to some weed growers. “earthy terps” don’t sell in the fruit market however. Those growers know what they did wrong surely.
Sour blueberry smell can taste like it smells, or taste sweet like blueberry muffin. There’s also blue raspberry flavor in weed.
The blueberry smells are probably butane derived. Of course Cannabis labs do not test for that and half the clowns growing would claim it smells like ethyl acetate. That’s the other end from the “earthy terps”. The “nute terps”.