Not taking care of a wise injured person who might recover & help guide others, teach children, care for children, help heal, reveal spiritual teachings, and otherwise be human would be profoundly stupid. Judging who to care for based solely on productivity or ability to direct others would also be profoundly stupid....this strategy sounds like middle-management.
Surely emotions and morale are worth considering as well. Even if someone is unproductive and stupid, but friendly and well-liked, then their death would impact everyone's productivity for some time.
Exactly. Every being has intrinsic value. A pure productivity perspective is rooted in dehumanization and a reductive take on what it means to live/survive/thrive.
Strawman