Everyone laughed at the idea of a web designer being a 'proper' job when the internet was young. People didn't understand how the new technology would go on to shape the world of business and commerce, and considered the sort of people who would sit at home and code webpages for fun 'nerds.' Now those same people are contacting those nerds and paying them big money to design webpages for them.
More and more new businesses spring up every day, and no business is complete without a webpage. The color scheme and style of your website can even come to define your brand. While most people can come up with a basic WordPress site quite easily, a discerning customer will spot a WordPress site a mile away. If you want a unique design that stands out in the market, you need to pay a professional. And it won't be cheap.