Users are caring more about how a site functions than looks
Having a nicely design site is great and all, but it really doesn’t matter all that much if your site doesn’t function well. Users are becoming more keenly aware to when something doesn’t work properly on a website.
It’s becoming more common for users to leave a website because they’ve encountered something that isn’t working well for them. Imagine how bad this could be for an e-commerce site?
Designers want their sites to look good, so it’s important that they can make the site function properly as well. Give the people what they want: function and design.