You keep focusing on exit nodes, and your favorite groups of people… while missing that relay nodes still help, and in either case you don’t get to choose whom you’re helping.
Laughing off the risk of actually getting killed, is also too naive, in a world with zealots just too happy to travel anywhere you might be.
In any case, I don’t feel like risking even jail time for maybe helping some people I might like, while most likely helping people I definitely don’t. If you do find that risk acceptable, then go for it.
Orbot, aka Tor, doesn’t just obfuscate the source IP, it hides it. What does that bring to the table with Syncthing?
PS: I don’t know who you are, other than you created a new account just to have this conversation, which strikes me as a bit odd.