I'm not sure what your point is, because both those countries have nuclear weapons?

No, because their abundant use of nuclear power, including fast breeders, has not contributed to nuclear proliferation.

France's fast breeders have been failures, and they recently cancelled their next iteration trying to make them work. China doesn't have any fast breeders beyond research work, as far as I know.

It may be that sodium cooled fast breeders had a fundamental materials flaw that was not recognized soon enough.

https://link.springer.com/article/10.1007/s11665-010-9763-5

Thanks for that. Even if those jurisdictions are not using fast breeder technology, I think they're still pretty good evidence that nuclear proliferation is low risk.