Earlier quoted context omitted.
That's because it's a consumption device, despite the heroic efforts of some people to prove otherwise. If I want to reply to an email I'll walk upstairs to my real computer rather than attempt to do it on our iPad. As Joey Hess said[1] "If it doesn't have a keyboard, I feel that my thoughts are being forced out through a straw." [1] https://usesthis.com/interviews/joey.hess/
ipads have a non-insignificant footprint as point of sales systems these days too, so I wouldn't say ipads are _only_ a consumption device. They are also a pretty solid task specific unit for certain specific industries.
I guess what OP was trying to say is that their application as creative tools (production vs consumption) is far more limited than the full fledged PC systems that we are used to.