The risks are so staggering that I would think they must genuinely believe that the jack connector is so technically obsolete that it makes the iPhone worse than the iPhone will be without it. I just can't fathom Tim Cook (or anyone) betting 100 billions for $30M/year. Of course I can be completely wrong.
[1] http://www.statista.com/statistics/263402/apples-iphone-reve...