When clearly it is not!
iPad OS is a scaled up mobile OS version. It is not suitable for heavy duty word process/numerical (Excel) calculation. Its memory is low (compared to computer) and hardware spec is not up to level of a computer.
Yes, I see no problem in typing few pages of text with minimal drawing in iPad but if someone tries to complete a book or thesis in iPad, then I seriously think they should have adopted a proper computer for their content creation tool.
So many times I see people cribbing here that their purchased iPad apps is not 100% compatible with Microsoft Office files. But it can't be (unless the app was developed by Microsoft).
Although iPad costs as much (or more) than a laptop, it is actually far less capable for content creation!
Use it as e-book reader, web browser and notepad and you have no problem. If one can't fathom the boundary between iPad and computer, soon s/he will hit brick wall.
PS: I should have posted this in general iPad forum! Mods please move.