Smog has regularly blanketed large areas of China in recent years. In the haze days, the weather forecast repeatedly reminds people to strengthen prevention, try to avoid outdoor activities, even if outdoor activities also need to take necessary protective measures. However, there are always a lot of brave people who don't take such warnings seriously and do all kinds of outdoor activities on smoggy days without wearing masks at all.
Which of the following could not be the reason why these brave people do not wear masks in smoggy days?
He is in good health and can carry it, not to mention many people around do not wear masks