Apple clearly does have a responsibility here, they acknowledge that themselves in their supplier policies. They have also taken steps previously to drop suppliers that have been found to use forced labour, so they're aware of the problem and willing to take action.

So the question here is what is the evidence, what does it show, and if Apple's inspections have missed anything how can they improve their policies and enforcement actions to ensure it doesn't happen again.

> They could see an iPhone boycott if this blows

Do you really expect a typical Apple user to actually care?

Others like HTC have also been accused of doing the same. You could put "Google Pixel" in the title.

Isn't it obvious? It is cheaper.