Feel like I read this chapter already, but I love how they put lives in quotes, I don't know if this fantasy world jails for life or executes bandits to save cash but either way its kinda hilarious. The impact he gets realizing he stole skills fails to account for the fact they were bandits who weren't trying to hold them hostage but straight up murder them all, and he feels bad for stealing their skills, not ensuring their deaths amidst the confusion.
It'd be better if lives wasn't in quotes, because I'm pretty sure in that situation, it is far more literal, and that them acknowledging they lost the fight and will either die or rot in jail the Mc realizes the sheer horror of his ability, it doesn't kill someone but it ruins their life (provided their life actually involves using their skills). He should come to that conclusion after first coming to terms with the fact that he essentially committed manslaughter, leaving the Foes crippled and easily beaten.
He acknowledged that looking at skills is a dick move, but first thing he does is look at their skills and then abuse that to save his skin. I'd prefer the thief got up to Rob them and he used judgement and taken him down with the standard cut, either murdering him there or losing consciousness due to blood loss, then had the flashback and used paste to glue the horse shoes to the ground and throw a rider or two, then in a burst of desperation remembers the words and steals their skills to save himself, making this decision much more plausible than the child who openly admits viewing others' status is a dick move but does it first chance for fun and coincidentally ends up finding a bandit