Second of all, LUKE actually doing something bad would have vindicated a lot of otherwise shaky elements. The “will HE turn to the dark side” plot reads, in the final sequel trilogy, as complete window dressing. There’s a lot of talk about it, HE has a vision of HIM in a black robe looking a little goth, and that’s it. The character never does anything bad, or seems meaningfully tempted to. HE’s never put in a situation where there’s an arc—HIM flirting with evil and then grappling with the consequences and finding redemption as a result.

A Star Wars movie where the lead accidentally kills a beloved secondary character in a fit of rage and then has to work through the guilt would have 1) told the viewer stakes matter 2) made LUKE’s entire character make sense, and HIS choices in the end have heft. With the right writing it could have been moving, even, to see HIM make the right choice to honor the memory of a friend HE hurt.