[amelius]

You say it as if there is a one-directional flow of information between PMs and developers.

In this case, perhaps, yes, the developers don't care and just do what the PMs tell them to do.

[wg0]

Engineer's Job is to carry out product's vision as faithfully as possible. Yes, can give suggestions and dispute things but engineers can't drive 100% of the product's function and if they can, what's point of having a separate function of product managers.