What someone does for someone else or an organization should be considered something of value. In many cases services rendered is a very valuable asset. Diminishing the contributions of those who work hard is not a good thing to do. I think people and what offer to a cause is the driving force behind a movement or a cause. You don’t get far without good people making things happen. A balance of praise and feedback can make the services better for all concerned. So when you are looking to build something up and make it even more valuable a good word or two can go a long way in advancing what you want to achieve.