So you think fair elections are less important than your own security? You may have a problem after your country turns authoritarian, even if your computer is secure.
We don't have "fair" elections after Citizen's United.
We don't have "fair" elections after the FCC scrapped the Fairness Doctrine in the 80s under Regan.
We don't have "fair" elections for the president since we don't directly elect the president.
The scenario where china somehow designs a dastardly TikTok video that convinces---I'm sorry "manipulates"---young people to vote en mass in a way that somehow advances the national interests of China and against their own material concerns is remote. But, I'm not sure how that's worse than any other garden variety Super PAC, or billionaire debutante like Mike Bloomberg or Howard Schultz.