Think about it, bags can be like black holes - you can fit a ton of stuff in them, but sometimes it's hard to find what you're looking for! And, let's be real, who hasn't had a klutzy moment where they've spilled something or dropped a bag and had to deal with the mess? Voice of America probably just wants to avoid all that drama and keep their workspace zen.
But, in all seriousness, their bag policy is likely in place to protect their equipment and ensure everyone's safety. I mean, can you imagine if someone accidentally left a forbidden item in their bag and it caused a security breach? Not good, right? So, it makes sense that they'd want to be proactive and have some rules in place.