No, you don't, but if you're taking all the data at a "subatomic level" you will have so much memory required than unless you have some kind of memory I haven't heard of, it will need to take that into account because the memory alone will have a volume of significant light-time dimensions.
You need something like 3 petabytes just to model the neurons. There are 100 trillion atoms in a neuron. And he said subatomic, so you need some significant factor of that, plus you have to save some state.
So 300 trillion petabytes+ might be a memory the size of the moon. I think relativity does matter at that scale. Also, you will probably have to mine silicon asteroids and invent an AI factory to make the memory, and power it with what, fusion?
So yeah, just model the brain at the subatomic level, bro, it's easy bro, and you're just a naysayer for saying it can't be done, bro.
But, please. If you have a solution to this, don't post it on HN, file a patent. Not just for the model, but for the revolutionary new dense memory, the location of silicon asteroids, the planetary memory factory, the power source for it, and so on.