That is a fair point, but remember, this is an Industrial Design forum, and Industrial Design is deeply rooted in designing for mass production and volume. To that, the mods responses were spot on, if you can accuse them of anything it would be for thinking too big.
Reality is that markets are evolving, tools, and modes of developing and marketing products have shifted to empower inventors and entrepreneurs more than ever before. Shwood’s venture is very entrepreneurial, perhaps all of their products are truly hand crafted, and that is a low volume / high premium business model that hopefully is working for them. Shifts in the luxury goods markets as of recent point to how important it is to be able to maintain a premium and exclusive offering to command high prices keeping the business profitable.
An alternative approach for the OP was to seek a designer willing to be a business venture partner and/or seek investors, but for that you need a great product idea and a business plan. The OP didn’t state he was looking to mass produce the sunglasses, just that he had an idea that he wanted to see visualized. So if anything he may want to work on his salesmanship to inspire a designer to come on board with him, but unless he has some connections, he may very well have to convince a less experienced designer to get involved. Maybe he had Kickstarter in mind to fund his idea?