I can imagine that especially during covid, there might have been some substantial convenience to having teamviewer on that computer system. Not justifying it's presence, but I do think this is a failure of IT not finding a way to make access to the system both secure and convenient.
Yeah, the IT person who is there Tuesdays and Thursdays, and helps plug unplugged mice in.
Surely they'll be capable of configuring a corporate VPN without a fat budget to have Cisco do it for them...right?