If you already know Docker CLI, is there a reason to use Portainer?

I often see people mention the Portainer project and how it's useful, but I never hear any reason to use it other than as a more user friendly front end to service management.

So is there any particular feature or reason to use portainer over docker's CLI? Or is it simply a method of convenience?

This isn't only strictly for self hosting, but I figure people here would know better.