This is quite an assertion. I am not privy to jobs vision for the iPad because I haven’t seen much written specifically and it’s evolution is pure speculation as he’s dead now. But you can’t extrapolate from the iPhone and call it a day. And the iPad and the Watch as well are not practically products that have matured under the jobs umbrella. Critical consensus has been pretty positive about the progression of MacOS under Jobs (it was quite a rocky road but look by 2008).