If you read on, Groq said they would only sell hardware to US companies and outside companies would get cloud services, not the LPUs. I think the US government told them to keep the LPUs in-house since they could be the secret sauce for scale.
[0] https://deepmind.google/discover/blog/millions-of-new-materi...
[1] https://www.aramco.com/en/news-media/speeches/2024/leap24--r...
Groq's system was designed to run arbitrary high performance numerical workloads. In the past it has been used for a variety of scientific computation tasks, including nuclear fusion and drug discovery.
https://www.alcf.anl.gov/news/argonne-deploys-new-groq-syste...
For vanity reasons and because AI is the future (not every company acts that rationally for huge buying decisions).