So instead of paying a subscription fee to Tailscale to support your distributed application, you pay a subscription fee to Iroh to support your distributed application. (
https://www.iroh.computer/pricing says $19/month for what most people will want to use it for).
Either one will allow you to stop "concentrating distributed technology to a handful of centralized owners", but the "why not use tailscale" part of what you're trying to say is not at all evident from your comment.