No, you're not crazy. While I disagree that managers will be less important, I think that you're making a good decision because technically differentiated managers will be more valuable.
Even if you go back to PM, the ability to code will help you communicate with engineers and identify the right solution for a given problem, enabling you to transcend the project management aspects of PM.
Also, many executives struggle with strategies that entail deep learning or blockchain, because they simply don't understand them. To position for a future where those technologies are critically important, it's a good idea to invest time today to learn how they really work.
Even if you go back to PM, the ability to code will help you communicate with engineers and identify the right solution for a given problem, enabling you to transcend the project management aspects of PM.
Also, many executives struggle with strategies that entail deep learning or blockchain, because they simply don't understand them. To position for a future where those technologies are critically important, it's a good idea to invest time today to learn how they really work.