Yes, on Falcon 9/Dragon. That differs from Starship w.r.t. human-rating in a few ways:
- Dragon can do an emergency abort, by (a) accelerating away from the booster and (b) parachuting down to a soft-landing. Starship's upper stage is so massive that such acceleration and soft-landing seem out of reach (ideally an emergency-fallback-everything-has-gone-wrong mode shouldn't rely on tricky maneuvers like their landing flip!). There may be ways around that, e.g. using an ejectable module, but it would all need designing, building, testing, validating, etc.
- Falcon 9 needed to prove its reliability by performing many successful uncrewed missions. Starship will need to take the same approach, but hasn't managed any yet ;)
- SpaceX had to stop making changes/improvements to Falcon 9, since NASA would reset the successful-mission-count back to zero after major changes. SpaceX was willing to do that, since they had another rocket to focus on (Starship). Also, it helped that Falcon 9 had already exceeded their expectations by the "Block 5" design (which is why Falcon Heavy hasn't seen much use; Falcon 9 is very capable on its own!). Even when Starship is reliably launching, it will likely undergo design changes for a while.
- Getting Starship to the Moon will need in-orbit refuelling. That's untested, and more dangerous than docking and crew transfer (which is now routine), so it makes sense to launch the crew separately and transfer them to an already-refuelled Starship. This doesn't add much complexity, since refuelling requires multiple launches, orbital rendezvous and docking anyway. The choice of crew launcher is then arbitrary: SLS, Falcon 9, Soyuz, Starship, etc.
(Earth) launch and landing will be the hardest parts to get crew-rated, if they ever are. Perhaps the only human-rated approaches will be smaller, safer systems like Soyuz (or some modern replacement on that scale), with immediate transfer to a Starship or space station once orbital. Given its cargo lifting capacity, and station-sized living space, that would still be a great improvement over today (although maybe not enough to pay back SpaceX's costs)
- Dragon can do an emergency abort, by (a) accelerating away from the booster and (b) parachuting down to a soft-landing. Starship's upper stage is so massive that such acceleration and soft-landing seem out of reach (ideally an emergency-fallback-everything-has-gone-wrong mode shouldn't rely on tricky maneuvers like their landing flip!). There may be ways around that, e.g. using an ejectable module, but it would all need designing, building, testing, validating, etc.
- Falcon 9 needed to prove its reliability by performing many successful uncrewed missions. Starship will need to take the same approach, but hasn't managed any yet ;)
- SpaceX had to stop making changes/improvements to Falcon 9, since NASA would reset the successful-mission-count back to zero after major changes. SpaceX was willing to do that, since they had another rocket to focus on (Starship). Also, it helped that Falcon 9 had already exceeded their expectations by the "Block 5" design (which is why Falcon Heavy hasn't seen much use; Falcon 9 is very capable on its own!). Even when Starship is reliably launching, it will likely undergo design changes for a while.
- Getting Starship to the Moon will need in-orbit refuelling. That's untested, and more dangerous than docking and crew transfer (which is now routine), so it makes sense to launch the crew separately and transfer them to an already-refuelled Starship. This doesn't add much complexity, since refuelling requires multiple launches, orbital rendezvous and docking anyway. The choice of crew launcher is then arbitrary: SLS, Falcon 9, Soyuz, Starship, etc.
(Earth) launch and landing will be the hardest parts to get crew-rated, if they ever are. Perhaps the only human-rated approaches will be smaller, safer systems like Soyuz (or some modern replacement on that scale), with immediate transfer to a Starship or space station once orbital. Given its cargo lifting capacity, and station-sized living space, that would still be a great improvement over today (although maybe not enough to pay back SpaceX's costs)