A lot of people have either straight up bad ideas or ideas that don't take into account things that people and departments outside of their immediate circle need/want.
Most people's ideas aren't novel so they won't be implemented for the same reasons they weren't last time. Occasionally, someone does come up with something new and a good manager should recognize that but the experience for the vast majority of people is that they were ignored.
Most people's ideas aren't novel so they won't be implemented for the same reasons they weren't last time. Occasionally, someone does come up with something new and a good manager should recognize that but the experience for the vast majority of people is that they were ignored.