Everything in life has it's purpose and uniqueness, the AI is a very good Innovation and yes, it will lead to the decrease in the demand of work force but truth be told, it can never replace the human power/place.
Humans are unique too and their role in any firm or business entity can never be over emphasized, besides, the AI would need a human to help in it's operation wouldn't it??
It sounds like you're contradicting yourself here a little bit here. You admit that AI will replace people in many jobs while claiming that humans are irreplaceable.
Even if we still need people to supervise AI operations, that does not mean the problem doesn't exist. It's not much of a consolation if you have 10 people operating certain AI tool if that tool replaced tens of thousands of people in their jobs.
Besides, can you name a single type of job that cannot be replaced by AI/automation and explain why?