I've worked with financial services, and insurance providers that would have done the opposite for cost saving measures. So, I'm not sure what to say here.
Financial Services are far more risk averse first than they are cost cutting, they literally have risk departments.
If you'd spent anytime working at one for swe you won't have access to popular open source frameworks, let alone Chinese LLMs. The LLM development is mostly occurring through collaborations with the regional LLM businesses or internal labs.
Regulators would have the head of any financial institution that used a Chinese model.