I don't know about that. Bounty Hunter, Hired Gun, etc... are all heavily focused on combat.
of the 27 current specs in EtoE, 13 of them know "some" form of combat. As you pointed out the Bounty Hunters and the Hired Guns compose 9 of those. The other 14 classes know nothing, not even how to throw a proper punch. Most groups are at least half composed of the later. Makes sense as combat isn't the primary objective of the game.
If a group/character from EtoE, opted to join the rebellion, it would be foolish to take them into war without at least knowing how to point and shoot a pistol.
Conversely, in AoR 13 of the 18 specs have some combat skill.
All the "classes" know some form of combat. Nothing is preventing anyone from taking ranks in the various combat skills. As to the rebellion and "non-combatants"... Not everyone needs to know how to shoot a gun to be in a rebellion. Even the Rebel Fleet needs the paper pushers, the quartermasters, the intel analysts, the engineers, etc... that may or may not know how to shoot a gun or throw a punch as they aren't the front-line fighters.