The article highlights several reasons why it's not possible to manufacture consumer electronics elsewhere. Moving significant production to Vietnam for example is not possible because of a lack of migrant workers, and India lacks the necessary infrastructure:
Speaking with experts such as researchers and former Foxconn executives, the article argues what others have previously argued: it's simply not possible for Apple to make the change frustrated investors and employees want it to make. For one example why, the article says:Via: ARS Technica
The population in China has allowed suppliers to build factories with a capacity for more than 250,000 people. The number of migrant workers in China, who do much of Apple's production, exceed Vietnam's total population of 100 million. India is the closest comparison, but its roads, ports, and infrastructure lag far behind those in China.