It’s great news he’s doing better. However he has an election to win and everyday he’s in that hospital people start to think he is not physically fit to be president for 4 more years he loses voters. If it were up to him he may not have gotten any treatment and than ended up like most people who might not have even gotten positive test result back yet, delayed any treatment and gotten much much worse. Point being just because he’s discharged from hospital doesn’t mean he’s out of the woods yet this covid disease has a way of getting fired up with cytokines storm even after patients start to feel like they are on way to recovery. The whole charade of taking a drive around the hospital was to let people know he’s the acting president and physically and mentally able to do so. There will be less cameras and attention to his heath once he goes back to White House and he knows that. He will still be getting therapeutics while at white House and unless things take drastic turn backwards he won’t go back to a hospital