I understand, appreciate and respect copyleft but I'm no zealot.
Fundamentally this rubs me the same wrong way as others attempting to enforce social contracts do. It feels wrong to assume that western ethics should be universal and apply to a foreign entity such as a business in China. Perhaps they simply view this as a viable approach? And, surprise, it is, at least for them. Do I wish that weren't the case? Sure, that'd be grand. But I don't see how this post gets us any closer to that fantasy.
Put yourself in their shoes. Someone released some software under a license designed around a foreign legal framework that doesn't apply to you. You can make products using that software that people want and make money. Is it your fault you are immune from the license? Is it your government's? Is it wrong to do so? I don't think it's clear enough.
And yeah the call to action should be clear. It's not. I don't see why they can't pursue legal action and go for damages or at the very least prevent the sale of their printers in local jurisdictions. Perhaps that would still be performative but it at least creates precedence that others can use to strengthen their own cases, or allow governments to push for action. But it appears like they're doing nothing.
If the US or the EU are going to do nothing about Chinese companies pedaling wares derived from US/EU IP made possible only by dodging licensing requirements then perhaps it's simply not a viable approach to rely on copyleft to protect you. Or you can try and change that.