Agree with the post and most points in the comments. One other issue I haven't seen mentioned though is what the existence of these tools can do to users. As many have said, the tools make it seem like anyone can build beautiful things starting from a blank slate which is not true.

But I also think these tools encourage people to think like print designers and design websites with a multitude of layouts—sometimes almost one design/layout per page. These tools make it easy to forget that consistency and simplicity are two of the most important parts of good user experience. If every page uses a different layout, websites become labyrinthine monstrosities...or at least a little harder to use :)

It's still pretty hard to beat this:

Header
Nav
Title
Body | Sidebar
Footer