Three things, and they are practical rather than romantic.
The first is vocabulary. When your report says that the picture you describe reads, in Chinese medicine, as dampness, that word is not a metaphor somebody chose this morning. It has a defined sense that goes back to the Neijing, a set of signs attached to it, and a literature arguing about its edges. You can look it up. So can anyone you show the report to.
The second is method. The Shanghan Lun is built out of 398 short clauses, each of which names a set of signs and then names what follows from them. That structure — this constellation, therefore this description — is the whole procedure of 辨证, bianzheng, and a reading is a small instance of it. We are not inventing a way of organising your answers; we are using an old and rather rigid one.
The third is restraint. The tradition is unusually clear about what it cannot see. Its own texts insist that the four examinations must be taken together, and we can only take three of them at this distance. Reading the classics closely makes you more careful about the gaps, not less. That is why the list of what we will not do is longer than the list of what we will.