No, it isn't. Look at the races in the PHB. Dwarves get weapon training, tool proficiency, language proficiency, possible armor training, and they're knowledgeable about stonework. These are all cultural traits. Even darkvision is explained by the fact that dwarves customarily live underground.
D&D races have always been abstract packages of traits many of which are easily interpreted as cultural if not outright stated to be so, and the idea that race in D&D only represents biology is revisionist.
I think it is very clear that some of the abilities are learned through their culture and others are innate. Here are some quotes out of the PHB:
"As a forest gnome, you have a
natural knack for illusion and
inherent quickness and stealth."
"As a rock gnome, you have a
natural inventiveness and hardiness..."
"Your half-orc character has certain traits
deriving from your orc ancestry."
"As a stout halfling, you're hardier than average and have some resistance to poison. Some say that stouts have
dwarven blood."
"Your elf character has a variety of
natural abilities, the results of
thousands of years of elven refinement."
"Your dwarf character has an assortment of
inborn abilities, the part and parcel of dwarven
nature."
So when you have clarifiers like these prior to listing a species traits, which include resiliencies and vision and magic use, then many people can, and should, assume that much of these are innate. If Wizards wants to change all that, that's fine. But it is incorrect to call the other people revisionists when these things are stated as such.
Edit: I get that you are implying that it is both too.