What you said is wrong on so many levels.
Firstly you pulled the "5 hardest dev jobs" out of your ass.
You can't measure the difficulty of creating software because there are a lot of variables involved. The size of the project and what the developers want to achieve for one.
AI can boil down to a bunch of if-else statements that even a novice programmer can make.
Large projects such as VMware and OSes are collective efforts. Each person or team of people do programming tasks that they are perfectly capable of, and that's how everything goes smoothly.