Not a Tradeoff — an Ordering
The usual way to talk about clarity and style is as a balance: some clarity here, some elegance there, tuned to taste. That framing is what this doctrine rejects. The relationship is not a tradeoff, it is a sequence with a gate in the middle.
Communication is the gate. You loop on the draft, asking only does this land, until the answer is yes. Passing the gate produces headroom — a surplus of comprehension. And flavor is spent out of that surplus, never before it exists.
The consequence is sharper than "clarity first." Before the gate opens, the flavor budget is exactly zero, which means rhythm work done there is not premature polish — it is counterfeit. It spends a surplus that does not exist, and then it hides the deficit under a smooth surface.
The Trap Is That the Counterfeit Looks Better
This is why the rule needs stating at all. An unpolished draft that fails to communicate looks unfinished, and everybody can see it needs work. A polished draft that fails to communicate looks done. The rhythm is even, the sentences are balanced, the phrasing is confident — and none of that is evidence of anything, because those properties can be manufactured independently of whether the reader follows.
So the polished failure survives review while the honest one gets fixed, which is an inversion worth taking personally if you write anything at all. The smoother a draft is, the more deliberately you have to ask whether it ever passed the gate, because smoothness is precisely the signal that would normally reassure you.
The Other Half: Headroom Is Meant to Be Spent
The doctrine is not an argument for plainness, and reading it that way misses half of it. Once the gate is open, leaving the headroom unspent is its own waste. Difficulty is a legitimate withdrawal against surplus — a demanding sentence is affordable exactly when comprehension has the budget to pay for it.
There is a matching counter-clause: prose is not obligated to be kind, but it is not licensed to be difficult without a reason either. The reason has to come from the genre, never from the author's taste. That is what keeps this from collapsing into either "simplify everything" or "my readers should work harder."