Do you mean Project Manager , or Product Manager? What you described as training a few devs sounded like Project Manager. If so, I agree. But a product manager's role is different. And you are right - it's about competitive research, domain expertise, customer interviews, and a product vision.
I have not seen a single product manager do the project management details in my 25 years of product/eng career.An engineering manager typically does that. I now run my own startup, and empowering engineers to define the product does not work. You may get some interesting and nice features, but you won't get a cohesive product that solves for a domain with decent usability. You need a PM/UX pair for any nontrivial product.
I have not seen a single product manager do the project management details in my 25 years of product/eng career.An engineering manager typically does that. I now run my own startup, and empowering engineers to define the product does not work. You may get some interesting and nice features, but you won't get a cohesive product that solves for a domain with decent usability. You need a PM/UX pair for any nontrivial product.