I think there's an omission in your argument. The reasonableness of not forming a friendship given limited time constraints is based on time being a limited res

I think there's an omission in your argument. The reasonableness of not forming a friendship given limited time constraints is based on time being a limited resource, e.g. it'd be better to spend time on other friendships. In your argument, you didn't analyze whether the time saved by not befriending You' was "better" spent reinforcing other friendships or whatever else. The company may have received less value from You', but the rest of the team may have increased their own value by forming stronger friendships. It's not necessary that this will be the case, but it's a non-trivial assumption to make that befriending "you" is the best allocation of resources. It all depends on the shape of the friendship-strengthening-to-company-value function.