I think you need to read Darth Plageuis.
90% of the powerful beings in SW have all experience.
Jacen, Sidious, Plageuis, Dooku, Darth Vader, Luke, Jaina, etc
I've read it about a month ago. These guys weren't fighting with top grandmasters etc. The biggest fight of Plagueis i remember is assassin's attack. Maybe, we got ourselves wrong. I didn't mean there needn't experience.
I just mean you still can be powerful without being involved in galactic wars or fighting with chaos bringers. If you mean something other, I'm sorry about misunderstanding.