This is mostly an era-related problem that has to do with how the cast has been structured, and it goes back to the NJO's decision, which was reasonable given YJK and other marketing considerations to elevate the Solo children to major character status. The NJO and onward has directed the main novel plotline towards what is essentially a family drama of the Skywalker-Solo clan, and just about everyone in that clan, except poor Han, uses the Force. Chewie's dead, Lando's old, and characters such as Wynn Dorvan and even Jag are constrained by their political station that means they have trouble mixing it up. Even the Rogues and Wraiths have mostly aged out of the front lines by the time of FotJ. Overall this pattern seems to be an outlier, one determined by the market-driven desire of Del Rey to move novels by placing Luke, Han, and Leia at the forefront, and by extension their Force-using offspring, romantic interests (the EU has generally take the wise stance of pairing Force User with Force user, but that does create Force-user glut), and so forth. Other eras have been much more flexible, even TCW, despite positively drowning in high-powered Jedi managed to add a whole stable of cool new bounty hunters and show them going toe-to-toe with Force-users.