As said, I’ve never seen a network that even tried to block any kind of VPN, and i have seen numerous networks… I kinda built them even. Good, i don’t think anyone outside of a clownshow authoritarian circlejerk would even try to do that.

All the serious companies (financial sector) I worked for so far did it, because as I linked is really easy with any cheap firewall solution.

clownshow authoritarian circlejerk

Well... a bank could be considerar that indeed, but you know, security concerns and all.

VPNs are very very necessary when you work with sensitive data in BtoB, wanna do remote checkup of a server? You better use a fucking VPN or you aint getting in.

So what? A company can use a firewall to block VPNs when the target IP isn't on some whitelist, or the source computer isn't authorized to use VPNs. On those high security setups at banks and whatnot client machines inside the company network won't need to touch a VPN to do a "remote checkup of a server" at some cloud provider as the network will be configured to internally route the traffic from all computers / users (backed by SSO/AD credential) to access those resources via a special VPN setup on some router / server.

Wanna help someone over TeamViewer? Thats not much different from a VPN…

Fortinet and WatchGuard can both distinguish a VPN from TeamViewer. They can actually do much more than that, even TeamViewer from RDP or VNC is just a couple of clicks on their UIs.