You also can't be the only seeder on a torrent for the same reason.
The main issue with I have with how the current i2p implementation works is that it essentially creates a walled garden in the torrent network, as i2p users can't seed out to non-i2p users, they can only leech from them. I feel like that would needlessly split the network, which relies on having as many people as possible seeding. Frankly I don't know if its even possible to work around that, but I'll need to see how it plays out. Also, there needs to be at least one person with a port forwarded on any given torrent. utp only peers cannot seed independently, from my understanding.
You honestly would need to automate it really, just search using scene naming conventions Media.Title.RlsYear.[Resolution.]Codec.[Special-Video-Features][.Audio-Format]-RlsGroup (Rls group can be rarbg or scener, bracketed tags are not required on every release if there isn't anything to note for those categories. Special features in this instance is HDR, dolby vision etc)
If this had some sort of option to bind it to a network interface I'd be able to use it with my vpn. This does seem promising though.