The system might do both, but the number of robotic craft will probably significantly outnumber the crewed vessels.
For example, the SpaceX moon lander is likely to use several tankers. And some of the landers might just ship cargo.
For example, the SpaceX moon lander is likely to use several tankers. And some of the landers might just ship cargo.
IMO, it's just much more effective to do both with the same system - like Falcon 9 which can fly Crew Dragon, but can also do regular cargo to orbit. It's important to improve systems like life support, etc. Launch is not enough.
Architecture becomes toxic when you can only launch with crew ala the Shuttle. SLS is pretty close to that - there is technically a cargo version of the rocket, and there are theoretical plans to launch deep space probes. But with Artemis using 1 (and according to some sources, up to 2) SLSes per year, that doesn't leave many available for cargo missions.