I think part of the reason is the same as another phenomenon I've seen before. Most people don't want to automate their work. In fact, they don't even want to change their behaviour at all. They have tasks which they are 100% confident and comfortable in, and completing them gives them satisfaction. As long as they can do that and keep their job, they will continue in that manner.
As a business owner, it makes me want to pull my hair out. There is so damn much wasted time and energy in this world. But I also can't blame them. They're happy, their boss is happy, the company is happy (for now).