Yes. That is correct.
Eventually, one will realize that no “rupa” (whether it is a poisoned cake or a poison-free cake) is of nicca, sukha, and atta nature.
- That complete comprehension of “yathabhuta nana” comes in stages and is complete at the Arahant stage. Then one will not be interested in any cake (of course, an Arahant will eat cake to satisfy hunger).
That holds for all five aggreagtes INCLUDING vedana, sanna, sankhara, vinnana. They all have the anatta (unfruitful) characteristic.