This question has been intriguing many a businesses now, it may be true that there are very basic web design programs to help you make a simple site, but it takes a professional to create a quality business site. Your website is your business reflection to the whole wide world, and any sort of opportunity may come along from here.
Presentation is the key.
Design is a factor in successful launch of your site. If you are giving out information or selling products to your customers a poorly designed and structurally lacking site with poor quality design and web artwork will not be able to sustain the customers for long. Designing web pages is an art, not only they should look good at various resolutions, but also how they will handle various browsers and platforms. First of all not all the software offer all the features that you need to incorporate within the web site, not all offer with all the software products to create and mange web sites, with each one having some advantage over the other in different areas, to create an effective web site you will be learning and practicing many different software's. The created site can remain unknown in the vast universe of the Internet.