I really hate how Product Managers somehow get to take the reins of engineering teams instead of having to sell them product ideas.

It's madness, they often lack the technical skills and "optimise away" requirements surfaced by eng teams they don't comprehend or just don't like having to deal with.

Because software engineering is not professional engineering.

Now, this doesn't always stops management, but when you have to have an engineering signoff it does make things a bit more difficult.