You disable the VPN, they show “unprotected”, come on, I’m not really unprotected, why such a dramatic word, I just disabled the thing a little, I’m “disconnected” but it doesn’t mean I’m actually unprotected, the same way it doesn’t mean I’m actually protected if I’m using a VPN.
The only problem I see with public wifi is the peer-to-peer nature of it. You no longer have the protection of a gateway if somebody is trying to be nefarious. They won’t sniff https traffic, but might attempt to connect to open services like an unsecured listener for the cat feeder.
In that instance, locking down the internet connection with a VPN would prevent an attack.
It is not peer to peer. You are connecting to somebody else’s Wi-Fi router to get to the internet and you go through their ISP.
So, a very simple man in the middle of attack would to be put up other Wi-Fi connections that look legitimate but are in fact somebody’s laptop hanging out in your location and now your communication is entirely visible, unless you’re using a vpn.
I’ve actually never really considered that. I guess all other apps also need to be secure or sandboxed or lack permissions to do anything although even then it seems like apps can just escalate permissions on there own without you doing anything.