Given that all GitHub teams are remote, the chance of having a team member at the same office is approximately 0. What's the point of commuting if you're not co-located with team members?

I think you’re trying to logic a situation that is not logical.

This does not stop every company from RTO mandates. My wife's employer is approaching full RTO and literally none of her team would go to the same office as her. And she was remote before COVID.