Different people seem to be defining re-watchable in different ways, so I’ll try to be clear in my answer.
I took the OP to be defining it as not too difficult a subject matter to revisit. In that sense, as the OP and others have said, I think there are a number of films that I’d consider great, but that I can’t really work up the emotional stamina to sit through again. I’d put Saving Private Ryan, The Revenant, Room and possibly Quills in that category. All of those films had a pretty profound impact on me, but I have no desire to relive some of the feelings I had while watching them.
Someone else talked about re-watchable meaning that there is something to be gained from watching the film more than once, and in that sense, yes, I think a truly great film is such a work of art that it would be impossible for most people to take in everything great about it on the first pass-through. I suppose that can be any of several aspects of the film, including the subtlety of dialog, the significance of scenery and background, or a number of other things. But something that the viewer might gain a new or deeper appreciation of during the second viewing, based on having the context of the full film in hand.