The trick is that you first get popular among actual surfers. That's a tiny population, the population doesn't like to spend money, it takes expensive R&D, expensive materials, difficult manual assembly for the abusive and difficult environment: not a lot of profit or market cap there.
But the dark pattern that the 'surf industry' have discovered and exploited, is that you then silently pivot to the market of people who wished they looked cool like surfers. That's a much bigger population, they have more money, and they don't care about the materials or performance of the gear.
Starting out as an actual surf business is optional, but encouraged, as it will help you market the story that you make cool surf gear. Skip that step if people will come into your department store anyways, just make the logo look similar to a prominent manufacturer. Similar tactics can be employed effectively in selling just about anything: SUVs and sports cars, ski gear, health food, artistic furniture...