I'm not sure that most posters actually read the article.
Apple never said Nicotine causes cancer, they said the computer was "beyond economical repair due to tar from cigarette smoke".
They also said "nicotine is on OSHA's list of hazardous substances and Apple would not require an employee to repair anything deemed hazardous to their health."
They never said cancer, they said hazardous. Nicotine is toxic, exposure to high concentrations can kill people, lower...