When the going gets tough, these people are very hard to work with. The lack of connection means it will be hard to understand each other when a solution must b

When the going gets tough, these people are very hard to work with. The lack of connection means it will be hard to understand each other when a solution must be worked out collaboratively. And the lack of a prior emotional connection between two people will make it very easy to escalate from "I disagree with your point" to "you're dumb and an asshole". Maybe some jobs don't require that, but as a software engineer I've needed to tread those interpersonal waters a lot. Discussions about interfaces, pushing back on requirements, picking up neat tricks, offering tough estimates, it's all much easier if there's already some report there.