Apple really really really wants to make more money from software subscriptions rather than hardware.

They have a much better chance to do this in their walled garden environment of iPhones and iPads rather than on OSX where they face competition from other vendors.

They have no incentive to make it easier to be mobile on your macbook when they would much rather you be on your iPhone and iPad instead.

Someday they would really love for macbooks to go away and for everyone to use iOS for everything as they will own the entire environment and competition is much less.