Rushed approach
"There seems to be an inherent line here that computers can't assimilate as many inputs as a human can, but the fact is that they can do this now and have been able to do this for decades. They can also assess situations and review a thousand outcomes from a scenario in a millisecond. All that is missing is the ability to program the code the way a pilot thinks. Once significant resources are directed to this task (if they aren't already being so directed) ALL aircraft will in theory eventually have the brain of the most experienced Captain that ever lived."
Computers can only assimilate the inputs that they are programmed to accept. They exclude anything else. A computer is restricted to the sensors which are attached to it. Humans are too, but are far superior in discriminating which sensors are failing and to what extent. Humans make sense of seemingly unrelated observations and sensory inputs.
Computers can also get trapped into logical circles and trap themselves into subroutines if not crash altogether.
As for your comment "all that is missing is the ability to program the code in the way a pilot thinks" is a difficult concept on many levels. Human brains are really cheap to produce and very effective in what they do. (Thanks Mr Clarke for that thought) If you program a computer with the way a pilot thinks then you assume that there is a super pilot without fault which is an absurdity. All pilots of all type ratings and backgrounds have differing views and influences on the aircraft they fly and have flown. To assimilate the knoweldge of a WW1 Sopwith Camel pilot to a F15 pilot is unattainable.
A computer can appreciate what information it is given. It is dependent upon data being current and appicable. A computer-flown aircraft may think it knows where the power lines are but that is dependent on human systems giving that data to the computer. I still believe that a computer flown aircraft will be capable of flying into a power line not because it is not visible but has not been updated with current hazards.
I would also repeat my comment earlier that human influences such as profit margins will never be excluded from flight operations and may actually reduce safety.