The hypothetical choice is, would I rather have the US or China listening to my phone, if I had to choose one, and "none of the above" was not an option.

It is not easy to assassinate someone in another continent, and I don't live in China.

There's also the chance that the assassination will fail, and even backfire, where the further investigation might reveal agent identities. I'm just not that worthwhile to possibly waste those resources.