Let’s say I decide I’ve had enough with this whole Federation business and that humanity would be better represented by a Starfleet that follows my particular ideology. Assuming I could get enough people for crew and support, why can’t I start my own Starfleet?
I could replicate ship parts until I have a couple vessels. Go to new worlds and present myself as the official first contact of humanity. I could fly to Vulcan or Bajor and tell them no actually my organization represents humanity.
What’s going to stop me?
My understanding is that replicators restructure atoms. In which case an asteroid would be plenty of material for a ship, even if some of it is lost in the process.
OK cool, now if only you had a ship to go get the asteroid so you could make a ship. My last point still stands though, if it were really that easy…
Sisko built a ship that could travel between planets and it didn’t even have an engine…
Solar sails are a real technology that exists in our real world.
He also launched it from a space station.