Actually you have two ways to share privileges in the server-manager
- be in the administrators group → full privilege
- be in the managers group → privilege only on the management section (I’m not sure that the dashboard is visible)
It is either too much, or really not enough 
Others are thinking like me, see
I have made separate root / admin / user panels (Working!) - #11 by Xonline
If you manage servers for your customers you probably want to restrict permissions, except if you love to hurt yourself and fix a lot of issues because several incompetents have all rights. You probably need to let a full access to certain, and just few management and configuration sections for others.
This is just an example but if you want to delegate an access to the server-manager, the dashboard is just another resource that you might want to share with the granted users !
Actually, I made like a code challenge for me to delegate per panel, it is maybe a need for some usages, but also we could think to delegate per section, it is easy, fast, efficient.
what do you think @dnutan
with all my respect @davidep the fact that a user cannot see the dashboard because it is hardcoded, is an issue for me.