Isn't it normal that changing the destination of all of a system's network traffic would require admin permissions? Why does that make you think it's a hack?
Most businesses never give their users admin permissions because it's a security can-of-worms, so for Unifi to push Wireguard for business doesn't make much sense. Happy for someone to point me at a turnkey Wireguard solution that just-works with InTune.
Tailscale?
> Fixed the issue where WireGuard VPN could not be used through Intune-deployed MSI installation.
Source: https://wiki.ui.com/docs/identity-enterprise-endpoints-0671
Needing local admin would make WG a non-starter for many organizations.