The value prop is that dumbpipe handles encryption, reconnection, UPnP, hole punching, relays, etc. It's not something I could easily replicate with netcat, for example.
ngrok and tailscale and lots of other services offer all of these capabilities, the only unique thing of this one seems to be the opaque string identifiers + some notion of "decentralization" which is what I'm trying to understand, particularly in the realm of how discovery works