Hate this. I work as a PO. Praise my devs every chance I get both internally and towards our clients. Always pass on positive feedback and use negative feedback only translated into priority weights.
I see my job as keeping stakeholders at bay and let them do their job. I bundle requests into feature requests that cover as many current and future needs as possible, but never without internal meetings first.
Just getting sales to stop making deals on feature requirements with clients was a very long uphill battle that we have mostly won. Now it all goes through my team first and we always do estimates with our development teams. Takes a bit of time, takes a bit longer, but never have I seen a client get back to us with the same urgency as they request a quote anyway. If they can not wait a week, they won't be a good fit for what we are doing and how we do things.
Posts like these make me feel accomplished :D