Apple has no idea what the iPad is for but somehow they sell 20 million of them a year...

Apple has been very clear what the iPad is "supposed" to be. It is a touch screen computer. Between its form factor, touch first OS, built in camera, and possible cellular capabilities it can do a lot that a Mac can't do. Something as simple as walking around with it and handing it to someone like a clipboard opens up a million uses in the field that would be much more awkward with a traditional laptop. Artists drawing directly on the surface, musicians playing with touch controls, etc. all take advantage of how the iPad works.

If you insist on using programs and workflows designed for laptop computers the iPad will never make sense to you. I use AUM, Drambo, and a variety of other soft synths and effects on my iPad in conjunction with my analog synths. It's a very different experience than a regular computer.