SharePoint is Cumbersome...Why not use a Wiki?

I had the displeasure of trying out SharePoint the past couple of days to get an understanding of why people like it...I left the experience still having no idea why someone would choose SharePoint over a wiki, especially Deki Wiki. With Deki Wiki you can easily integrate dynamic web services along with easily add content and attachments. It is so intuitive whereas SharePoint requires someone who is Trained in it and a large $xx,000 license.