Yandex and Baidu have existed for a long time, go ahead and use them if you want to.

Why risk giving data to Russia/China when we have duckduckgo?

Under US jurisdiction.

True, although DDG's dedication to anonymizing searches seems it would make data retrieval more difficult.

That said, the options look unappealing. If it really comes down to it, would you rather be giving your information away to US, Chinese or Russian agents?

I'd rather give it away to the one that I'm not under the jurisdiction of.