I disagree. You don't need pair programming to build a team. Overwhelming percentage of successful teams exist without pair programming.

One can be an effective leader, communicates well, designs and architects large system, mentors junior developers, inspires them to learn, coordinates development effort, sets up development processes and standards, and develops awesome software without doing pair programming.

Pair programming is not the only and true way to develop software. It's just some passé imposed by Agile advocates.