Part one introduced it's own FUD and didn't really contribute to the overall discussion.
Part two has the most useful stuff "Other Potential Actions Besides Bans and Lobbyists".
Part three points out some of the reality - America (other than in raw computers) has dropped the ball on electronics, manufacturing, and pushing the envelope - letting the Asian companies leap far ahead (look back at part two).
BUT, I work for a group that I can't divulge and the reality is that ANY Chinese company is effectively an arm of the CCP. If the CCP wants access, they have access. It's an unfortunate reality that most Americans don't know this, and so many American companies choose to be in bed with Chinese companies. Because of this reality, for the last few years that US Military, security services, etc have had to take the stance that electronics coming from China that have the capability to store and transmit data can very likely be used to send data back to the PRC to be mined. They have entire organizations that do nothing but that. And it has been proven that even basic computer chips produced there have had code embedded into them to do that very thing. So unless someone has actually reverse engineered the code in a DJI drone and understand every line of it and what it does, who knows what they might be able to do?
There is also a reason that China can undercut anything made in this country - they can effectively limit wages however they want to, by guidance from the CCP, when they want to control a market. I learned this years ago when I worked for the Navy and visited a commercial shipyard where they showed us their newest giant crane for moving ship sections. Historically those had all come from Germany, but this new crane was "as good as" the older cranes, but cost a fraction of them. Due to corporate espionage, and effectively forced labor, the Chinese can decide to enter a market and ultimately dominate it if they want to - pushing all others out. And of course unions in this country have driven wages for manufacturing far beyond what those jobs are truly valued at, thus passing along the cost to the customer. It's the reason why entire industries no longer exist in this country and have moved overseas or into South American markets. Americans, because of cheap overseas (or south of the border) labor, have become accustom to certain price points for products. That's a negative side effect of globalization - certain products will always be cheaper when produced in certain places. And unfortunately, many times those places aren't our friends, or allies.
This situation has a lot more variables than many drone flyers seem to want to acknowledge. I'm not saying an outright ban on the sell of DJI drones is the answer, and like I said, Part two gets closest to suggesting some alternatives.