I agree. And let me say, I know nothing about surfing, and am basing my discussion on this one article.
I think it's inevitable that the lower barrier to entry will allow the sport to grow, and be good for the "high-end" in the long-run. That's good. But in the meantime, this sort of breakthrough puts pressure on the existing system. I have to assume that shops used to sell more $300 boards than $1000 boards. Now they might be selling zero $300 boards, which have been replaced by the Costco special. So, small shops close. Low-volume producers go out of business. That's exactly what technological disruption is.
I say this because my local mom and pop surfshop on the beach doesn't even offer in-stock brand-new surfboards. You can however custom order from a local shaper through them. They focus heavily on surf apparel and used surfboards.