One reason there wasn’t an emphasis on reducing hallucinations is because the problem is hard. Some argue that hallucinations are “baked into” AI chatbots.
E. Bender, T. Gebru, A. McMillan-Major, and S. Shmitchell. Proceedings of the 2021 ACM Conference on Fairness, Accountability, and Transparency, page 610–623. New York, NY, USA, Association for Computing Machinery, (2021)