I think this is a pragmatic choice. NAT Hole Punching can be hit or miss no matter the method but doing peer routing guarantees even a client that can only init

I think this is a pragmatic choice. NAT Hole Punching can be hit or miss no matter the method but doing peer routing guarantees even a client that can only initiate outbound connections can route packets. It can be slow though. I also know there's support for other transports like QUIC but TCP is the main default.