Sorry, but i don't agree with you. You seem to have created a stereotype of mostly negative attributes and associated them with the role of a Product Managers. That may be your biased view of what constitute a Product Manager.

You rightly pointed out what a product manager should look like, but you don't need to create a new role for that. You can create as many new titles as you wish, e.g. Product Architect, Master, Guru, titles alone will not fix the problem. Instead of creating a new role, however, you should focus on how problems could be fixed within the existing structure.