You are right in the fact that it's reverse society world, but the MC was isekai-ed from - iirc - our Earth, and has been described and shown as a soldier worth tens of the female knights (well maybe only the soldiers, not the ones training hard.. anyway).
With that in mind, his charge on the carriage when he saw it was mostly unjured soldier could have been dealt with a non lethal strike.
It's mostly wishful thinking, that since he wields death maybe not bringing it down this fast would be interesting. Faust dealing with them this way is fine either way
