Why? Have you ever actually had a prospective diver tell you they were "shopping for a new hobby and are trying to decide whether they should take up golf or scuba diving"? Or are you trying to convince people who have decided to take up golf to take up diving instead? Perhaps you're trying to get golfers to give up golf and replace it with scuba?
Who would you try to convey this to... and toward what end?
Golfers? If they've already laid out money for golf gear/lessons and greens fees going forward, and ostensibly have some level of "commitment" to golf... will they have time, money, inclination to dive? How high is the risk that your "costs about the same" story actually conveys that scuba is
expensive? Pretty good, I suspect... since both actually ARE expensive? (Additionally, for the highly affluent golfer... the cost of scuba training/gear is probably not an issue anyway.)
Non-Golfers? There would seem to be little. if any, value in comparing the cost of scuba to the cost of an activity that is either completely irrelevant... or has been specifically rejected.
Potential-Golfers? I will posit that the number of people whose thought process is "I will take up scuba or golf... whichever is cheaper" or "I'd love to take up scuba diving, but I'm going to take up golf instead because it's cheaper than diving" is pretty close to zero.
I think the risk of communicating "scuba is expensive" is pretty high with this argument. Particularly since golf is already seen as being an elite/luxury/affluent pursuit.
More often than not, a cost objection (to anything, not scuba specifically) raised by a potential customer is actually an indication that they simply don't see the value of buying the product/service in general (ie at ANY price)... or the value is seen as being lower than that of a competing product/service that is ALSO being considered. Because of this, a "cost rationalization" argument rarely works because it does not address whatever their underlying objection actually is. The more potent response is to...
- Uncover the actual objection ("Scuba is expensive for something I won't be able to do that often." or "...for something I don't know if I'll like." or "...for something that seems dangerous."
- Overcome the actual objection ("There are more opportunities to dive than just on vacation... cert is good forever so value is over a lifetime." or "We can do a discover Scuba program first so you can see how much fun it is..." etc.
- Provide additional information to increase the perceived VALUE of the product/service. ("Meet new people, go to new places, see new things" etc)
The only time a price comparison message really resonates is when the customer is in active buying mode, have narrowed their consideration set, and are trying to decide between products that they perceive to be of relatively equal quality and value... and are specifically looking to price as a means of discriminating between the two. For example, if someone believes that a 3-Series BMW and an A4 Class Audi are fairly comparable vehicles... they might be swayed to the Audi by a significant price differential. Similarly, if someone really wants a BMW but erroneously believes that the Audi is cheaper... pointing out price parity could sway them to the BMW.
However - absent specific information that the Audi is also in the active consideration set - it makes no sense for a BMW sales person to use "costs no more than an Audi" as part of the selling message.