rmssetc
Contributor
Do you define "dangerous" as just the number of incidents-per-activity (ie., accidents per mile traveled), or do you include a measure of severity?I do virtually no pre-drive checks on my car. Most of the time I ignore the check engine light on the dash. I try to remember to check the oil, tire pressure and the tread conditions on my car, but it is at best sporadic. By your metric The airlines, which keep meticulous service records, require hours and hours of simulations and training for air crews and retire airframes after a certain number of flight hours should be far more dangerous than driving.
But it's not. Driving is far more dangerous.
Meticulous maintenance and training and operation lower the incident rate (in traveler/miles, number of trips) in commercial flying below the incident rate in driving. However, about 25% of commercial airline accidents result in fatalities (U.S. general aviation: fatal and non-fatal accidents | Statista), compared to automobile accidents, with about a 2% accident fatality rate (U.S.: number of road accidents per one million inhabitants 2013-2028 | Statista, U.S.: number of road traffic fatalities per one million inhabitants 2013-2028 | Statista).
Diving is inherently dangerous.Diving is safe because divers make it safe.
Diving is safer per dive compared to, say, skiiing, because industry and diver practices contribute to a relatively low number of accidents, but the severity of incidents is much higher (annual deaths/diver) due to the intrinsic nature of the activity.
No type of equipment, training, maintenance, or practices can make diving or flying inherently safe -- they both take place in environments that require life-support equipment -- but they can be made safer than expected in comparison to other activities.