Yes indeed if technology and science was stopped from lack of perfect knowledge we'd never have done anything at all. Making your washing machine or car didn't require knowledge of quantum theory for quantum theory has negligible impact on systems of that scale. Unless you can prove human beings need this ultra low and deep level of physical modeling to work, then such a statement is nonsense. A llm might well have enough structure for consciousness to emerge. They do have a sensory organ, and at present that sensory organ takes in text and to some extent images. I also do not posit that all consciousness must be exactly similar to ours, eg octopuses exist.