Let's assume that there 100% tariffs are applied to all DJI drones imported into the US. The price doubles to the consumer. (China does not pay the tariffs, as claimed by a former president.) What other drones can US buyers purchase, now that DJI is priced so high? I don't see any decent alternatives. There really are no significant consumer or light commercial drones built in the US.
The American government overall is not promoting restrictions on DJI. It's the work of a few very vocal elected representatives. It appears to me that they're motivated by emotion, misinformation, and knee-jerk anti-Chinese sentiment and have no factual basis to prove a need for action. But again, it's not the American government raising a fuss; it's a few elected members of that government.