It’s fair enough to call things different to what that actually are. Vegetables in common language just means the stuff treated as vegetables in the kitchen. Calling all the things that are actually fruit fruit isn’t really useful in the kitchen. I don’t want tomato or pumpkin or cucumber in a fruit salad

Likewise with berries. Using the scientific names isn’t useful in the kitchen, strawberries, blueberries, blackberries are all used similarly, despite only one of those is technically a berry