We like taking photos, don’t we?
It’s like whatever we do, and wherever we go, we mostly take photos of them to remember them.
Taking photos (and videos) is becoming our lifestyle to archive memories. And we also like putting them in the cloud managed by giant social media companies because we enjoy their services for free (no, we actually pay them with our attention).
And in a group, there’d always be someone who initiates taking the group photo. Mostly because they are passionate about it and often because they have the best device to do so.