For me ... it can be. The issue is, I typically drink a ton while at the movies. Largest usually. By the end of the movie, sometimes I can get up and all of a sudden feel the pressure of a full bladder. I have mentioned this previously though, that the sensation for me of having to go is a bit of an issue. I can at times not feel like I have to go at all till my bladder is nearly full.
So .. would need to rush to the bathroom after a movie. Though sometimes I can still make it home. Overall, I just find it's more convenient to be diapered.
Don't even get me started if I drank a lot before the movie too. XD
Long car rides are worse, I absolutely must be diapered because I have wet myself in the car while on the road. It wasn't a full bladder leak but the seat was pretty wet, and as soon as we stopped at a pitstop and I got out it hurt so bad, could not even make it a few steps.