Compare a Joomla website to a dreamweaver or HTML site for a customer and you might think hmmh! how do I describe this, but in fact its really easy to do isn't it?
I had one today... Can I have a £100 website but, I want this feature and that feature and I want it just like so and so's - that's a simple website isn't it?
No, in fact that website is probably £2-£3k because what has happened is the site has been super-simplified. In other words all the tables and tracking modules have been designed so an idiot could use it with minimal guidance. It looks simple so it doesn't scare you but, the coding behind the project is scarey.
JOOMLA is like that, all the scarey stuff is done behind the scenes and the look at the front end is standard and clean and people can find their way around but, without worrying about what to press and where to go.