>>1331360A helmet is safer yes, but it's better to aim for a road network where a helmet isn't necessary than spreading the use of helmets. I don't wear one because I can get everywhere on dedicated bike paths, fully separated from other traffic. Of my daily commute of 45 minutes, 95% is on bike paths, the only 5% left is road crossings or tiny parts on 30km/h roads so also not that dangerous.