If your compensation is based on visibility, then communicating the importance of your work is as important as doing it. If your company will pay you more if you spend less time working and more time communicating about your work, then you should make that adjustment.
If you don't advocate for the work you do, or yourself, you're making it harder for EVERYONE.
Humbleness is fine, but laboring in the shadows on critical stuff makes it harder to allocate resources to where they are best directed (like you and the work you do!).
If your compensation is based on visibility, then communicating the importance of your work is as important as doing it. If your company will pay you more if you spend less time working and more time communicating about your work, then you should make that adjustment.