Calling out tailscale here is odd considering it's peer-to-peer and encrypted.
“Security
Tailscale and WireGuard offer identical point-to-point traffic encryption.
Using Tailscale introduces a dependency on Tailscale’s security. Using WireGuard directly does not. It is important to note that a device’s private key never leaves the device and thus Tailscale cannot decrypt network traffic. Our client code is open source, so you can confirm that yourself.”
Tailnet lock helps mitigate this by requiring that node public keys are signed by a trusted signing node, but it isn't bulletproof.
Like what? I'm saying both sides of the connection would be given the wrong public keys by the coordination server. The private keys of which would be held by a MITM.