For one, you could more easily get on no-fly lists, since more data about you means more data to match against whatever secret crterion. Even if it is all false positives.

The USA is well known for global power projection and coups/CIA plans/military operations around the globe. China… can barely get their own ships out of their own backyard.

From the perspective of the global citizen, arguably the USA would present more unilateral risk. The USA wouldn’t hesitate to act in their own interests in a way that screws others over. Then again, China has even less scruples, so it’s a lose/lose situation here.