The problem would be lying about the scope of the problem. Daisey said he stood outside the factory for a few hours and met all these people when, in fact, he met none of them.
The fact that one worker was once exposed to a toxic substance is an accident, if it happens all the time, it is a problem.
60 Minutes reported that Foxconn had installed nets to prevent suicides by workers after 10 workers killed themselves last year. They didn't take the time to point out that the factory had 400,000 employees in it's mini-city, and that the US suicide rate is 11.8/100,000 and that China's is 22/100,000. So the suicide rate at Foxconn is lower than that of both China and the US by a significant margin.
If you lie or exaggerate about the problem it makes it seem like the problem might not really be a problem.