>The complete package includes things like highly curated training data, specialized tokenizers, pre and post training regimens, guardrails, optimized system prompts etc, all tuned to coding.

And even with all that, they still produce garbage way too often. If we continue the "car" analogy, the car would crash randomly sometimes when you leave the driveway, and sometimes it would just drive into the house. So you add all kinds of fancy bumpers to the car and guard rails to the roads, and the car still runs off the road way too often.