I think you are looking at this far too subjectively. If demand for all products were reduced not just Apple. However, I think reduced demand for Apple products alone would make a significant impact considering that you don't see the sort of lines for new products when Nokia or HP releases something (save the HP TouchPad firesale).
Yes, but all you'd end up with are employees who get fired due to lack of demand from their factory.
You're not going to reduce the stress on employees by not purchasing or replacing products. You end up with fewer employees, and these remaining employees suffer the same amount of stress. The others who get fired may not be able to survive or pay for things like food.