A bit less, but you'd be surprised how much is similar. The films are delivered on physical drives, loaded and unloaded, sent back. There's keying in timings with lights & curtains & music etc., there's checking it actually worked (because yes you're right, there isn't a projectionist sitting there the entire time).

If all goes to plan it definitely is less, I suppose it's roughly the same work for 1 showing, but almost nothing for the rest. But not nothing, and obviously it does go wrong sometimes.