Bitcoin is just money. Money has no inherent value except the trade value for goods/services (both today and its future value). Humans don't need bitcoin. But I do need bananas and eggs and a car and a home etc...

So yes, what you can get for your bitcoin is critically important. That value is typically denominated against a fiat currency because we all understand that $0.25 can typically buy a banana. Or that $30,000 can buy a car.

99.999% of the world does not price bananas or cars in btc. That is why the "fiat brain" exists, because we still live in the fiat world.

We can hope for that to transition sooner rather than later, but pretending it isn't that way doesn't make it so.