Because this is a base intuition and inclination, we employ this clumsily even in cases where it's not really the right tool for the job.
I know many engineers would prefer to just focus on engineering, but creating something meaningful for people means working with and through people. Even the most hands-off, self-service SaaS products depend on this.
Take an extreme case like Minecraft, where a single person behind a computer created a billion-dollar company. I'd argue that even here a significant part of that success came from Notch's very active involvement in the community.
> a significant part of that success came from Notch's very active involvement in the community
I've never heard it argued otherwise, although it probably doesn't get emphasized enough. It was very interesting at the time to watch how closely he interacted with the community, asking opinions and listening, while also making them feel involved by being open about the details of what he was doing. It was a massively refreshing counter to the way the big game studios were coming across so arrogantly at the time, being certain they knew better than their users about what the users wanted. Notch's attitude created that community feel around the game, and made you feel unusually close to the development and even the decision-making processes. That in turn led to word-of-mouth advertising that resulted in Minecraft becoming one of the biggest selling games of all time.