That can be used for professional development?
Rapid prototype to show to the client. Probably. But no more.
I suppose that depends on the designer, no? And of course the complexity of the website, Web Designer is better suited to smaller to medium size websites. Web Designer is a tool, and a tool is just a tool. In the almost 20 years I have used Xara products to create print work, logos, brochures, magazine advertisements, and websites, I have never had one client who asked what software I used. What matters is the results. And if a client is more hung up on what software you will be using, then that is not a client I will ever accept work from.