I have gone through this process and evaluated the results. Maybe you're referring to their comment as written, but going through what OC described + handholding leads to very good results in my experience.
I'll take the opportunity to note that if you're running solid evals, you'll have data to back the efficacy of your system. If you are seeing a hallucination rate of 1%, then you certainly should be working on your harness/toolset/context/prompting etc.
Saying "1% hallucination rate..." is akin to saying "30,000mi lifespan for [modern japanese make engine]". Something is wrong.