Killer ideas generally come from personal experience within a field and look obvious to the person in question. You cannot create fire by banging rocks together

Killer ideas generally come from personal experience within a field and look obvious to the person in question. You cannot create fire by banging rocks together unless you know what you're doing. What I'm getting at is you can't create a new never seen idea without having some background in that field but you can apply what you know to create something better.