Because she had joined the Chat Group, Kasumigaoka Utaha did not need to worry about threats from any country. She could help all of Human Civilization, or she could help a single nation.
Any country that obtained the full technological information of a Level 2 Civilization would rapidly develop to its peak in a short period of time.
If Kasumigaoka Utaha helped Huaxia or a country like Lighthouse, they would certainly be able to quickly absorb that knowledge and elevate their own civilization's technological level.
There was no need to consider benefits, threats, talent, or anything else. Kasumigaoka Utaha only needed to tell them the technology they required; they would solve the rest themselves.
In the end, Kasumigaoka Utaha wanted to advance human technological civilization only so she could gain a stable channel for earning Points. She did not truly want to become a driving force behind civilization's progress.
Although those technologies held immense value, that was only for the current Earth Civilization. To Kasumigaoka Utaha, Points were what mattered most. As long as she had enough Points, the things she could buy would be far more valuable than this knowledge.
The reason she had chosen to cooperate with him was probably also because she did not fully trust the nations of the world. She could not be sure whether, after receiving her help, they would use the technology obtained from her to harm other human nations once their ambitions spiraled out of control.
Her strength was not enough to make every nation on Earth respect her opinion, and the other Chat Group members could not possibly help her suppress every country unconditionally when she was not under threat. So, the only person she could protect was herself.
She wanted to earn Points, but she did not want her existence