Commitment to diving is probably the biggest hurdle to diving. Diving isn’t a cheap sport, you need training and equipment, so you are dropping $500-700 to get the basic training. Diving is also very location dependent. A lot of people make destination vacations just for diving, that means a week of vacation is committed to the sport. Miss a year or two and your gear ends up on Craig’s List eight years later.
A boat charter requires you to be at the dock early and spend a big chunk of the day for a single dive or the entire day for a two tanks charter. You may get blown out by the weather the day before or get to the site and have crappy conditions. Diving has a lot of uncertainties for each outing with high up front expenses.
Expenses this year, $500 prescription mask, 4 tanks need hydro $150, BCD repair $35, DPV $300. That is without servicing to regulator sets or the Peregrine computer I am thinking about buying. I easily spend $1,000 to $1,500 a year on “stuff” to do 25 to 50 dives a year. Don’t forget gas for the car, air for my tanks, lunches on the road.
Compare that with other outdoor sports. Skiing at least you know what conditions will be like before you leave the house and the basic gear can be had much cheaper and the cost of entry can be pretty low. Kayaking, biking, fishing and camping can all be gotten into relatively cheaply and can be done almost anywhere within a reasonable distance of home.
My guess is when you start to compare adventure travel, scuba starts to rate very favorably to other sports, like kayaking or skiing. But it is cheap and easy to have a kayak sitting in the garage for the five or six times a year you want to go out for a paddle on the local lake. It is much harder to do with SCUBA because gear needs to be serviced, weather and tides also need to be calculated in.
On top of that, a certain portion of the dive community likes to build up the risks associated with diving that make make it seem more like an extreme sport than it really is. There is plenty of diving that is fun, low risk, high reward entertainment and not a death defying extreme sport.
Has anyone ever rated another skier or paddler by how many ski days they have had or miles they paddled? Diving tends towards rating people by experience that probably intimidates newer divers and skews their risk perception.