Ideas x Experience
As you become more senior in the design field, the quality of the ideas not necessarily get better or brighter. But they get:
+ more connected to brand / story / strategy
+ presented with more resolution and detail (eg. how you can make it happen...)
+ visually more impactful
+ presented in a way that is more concise and to the point
Want to give better ideas? Work on the narrative around your idea.
For divergent minds out there, your first ideas are probably the ones that everyone else will have as well. Don't be afraid to share and build on top of them. In the creative field it is important to feel in a safe environment to play comfortably in your own skin.