Drawing a very bright, very wide, strongly-enforced safety line well away from any potential hazard has value. It also has harms: it decreases respect for rule

Drawing a very bright, very wide, strongly-enforced safety line well away from any potential hazard has value. It also has harms: it decreases respect for rules that actually do make sense, and it can encourage people to substitute more dangerous activities. If Alice values taking a walk outside without a mask at 50, walking with a mask at 30, and going to a shopping mall (with a mask) at 40, strictly enforcing outdoor mask mandates is going to make her both less happy and more at risk.