[mhss]

See my answer above. You're assuming is easy for management to know exactly what you're doing. This will vary from org to org and how many reports do they have, how complex the work is, how much autonomy everyone has, etc;

Sure, you can take the stance "they should know", but then don't complain when even well-intentioned managers can lose perspective or miss some of your accomplishments when is time to recognize your efforts (promo, raises, etc).

I consider myself a "well intentioned" manager, I care about my team and their work, try to keep up with the details, etc; but there's just too much going on at a large organization and I'm fallible. I may forget, or fail to see the complexity and value of something someone did (even my own accomplishments). There's nothing wrong with advocating for yourself and making your manager aware of your stance. If there's disagreement about how valuable something I did is I'd rather know when having that conversation. I may learn my manager cares more about x/y/z and not something I thought it was valuable but turns out is not important for the org or my manager for some reason I wasn't aware of.