Agreed, however it is a trivia gem that Han solo is the only non-jedi/sith to be shown wielding a saber. And he does so clumsily, just as Luke was very clumsy with anakin’s saber the first time he ignited it before training. And also, there is the fact that you must be able to tune a crystal with the force to make a saber, however, put a saber in hans hand and have him go up against a group of storm troopers, he would die almost instantly. He doesnt have the force speed and focus to deflect any bolts.

In this example, Vader could have a rallying ability in the force, and he may be able to augment the clone’s abilities, but at least in my oppinion, a saber is no better than a vibroblade in the hands of a non-sensetive because its actually more likely that the wielder will become overwhelmed in combat and hurt themselves with the saber.

This goes with what Zen said, id buy that this is more concept artwork before Lucas made rationalizations for why a non force sensitives cant even wield a saber.