It's rarely that blatant. Most people use more covert methods to keep engineers out of the lifecycle. It can be frustrating because most of these statements can be valid when uttered under different circumstances.

- "Only "power users" will use that." Sometimes this one's true, but some people will say this about any idea engineers come up with.

- "Let's see what someone in product thinks." The key thing you have to pay attention to here is the subtext. If it's "Let's keep product people in the loop", that's good. If it's "Your idea is invalid because you don't have the title 'Product Manager'", then you have a problem.

- "I understand you don't want to complicate the code, but our customers don't care about that." This one's a minefield. It puts you in a place where you have to either make a poor technical decision, or get accused of not caring about the customer.

But by far the most common tactic is merely excluding engineers from important meetings, and only bringing them in when they need someone to write the code.