That was not an exhaustive list of every issue universal to all users, that was just the shortcomings I ran into in a single morning of going to give a presentation and trying to use the iPad to do it. The point was, the iPad allows a very narrow set of functionality, and it expects you to operate within that in a limited number of ways. Going beyond that extremely basic functionality, trying to use it as a versatile tool to accomplish work in varying environments where the consequences are high, as in the often unpredictable needs of a "Professional", is fraught with errors and dead ends.
The long obsolete 2009 macbook pro was able to pick up the slack to make up for the state of the art iPads inability to perform basic functionality. I want to find something the iPad is good at, but aside from surfing the web and messaging, I haven't come up with anything yet.