Most hardware has no reason to require direct internet access or an account with the manufacturer to work. If some device requires internet access, then it cannot be trusted to not transmit personal data, therefore it should be possible to replace the software on that device, so that something that is trusted by the consumer can be installed.

While DJI here might create good hardware, their internet and account requirement makes it uncontrollable by the consumer, so I do understand that some consumers or, the possible more security aware US, will not trust it. But for the same reason China and other countries might not trust Apple or similar.

Trust is something that needs to be earned and which has to go both ways, if a company doesn't trust their users, and prevents people using their bought products however they like, then why should their users trust the company and let their uncontrollable software record their private lives and possible report back to them?