One aspect of this may be Chinese laws, which I am assuming if they don't already require the ability to monitor or even censor what gets printed, they will soon. Even in the US we are starting to have legislation related to blocking firearm component printing, but this doesn't necessarily mean central servers do it or have access to everything printed. Yet.

I think the primary problem is actually more than just Bambu's behavior, it's that China is an authoritarian country, and most of the population not only accepts the idea of central servers monitoring and "moderating" behavior but largely may embrace it as a sensible thing to do. It's probably beyond Stockholm Syndrome to the point of much of the culture genuinely not completely even understanding the idea of why privacy and personal control is important.

Much of the United States is so far on the other side that they can't begin to understand the position Bambu is in. Large companies in that country just do not have the option to allow their users to bypass censorship and monitoring.

I do think it's actually great that this type of issue gets in everyone's face though and it's great people are fighting back. But realize that the problem is deeper than one company. It's the whole type of government and attitude towards it and technology.