I would say that depends in part on whether it's a fetish or a kink for you. A kink is is a non-mainstream sexual turn-on or desire that goes alongside or in addition to otherwise fairly normal sexual desires. The line between a kink and a fetish is that a person with a fetish cannot achieve sexual arousal or satisfaction from mainstream stimuli. In other words, a kink augments common desires, whereas a fetish replaces them.
For people who like diapers as a kink, there probably are probably not a whole lot of benefits, other than maybe not being so opposed to wearing a diaper in times when it can be a real help. People with kinks often live otherwise "normal" lives, with all the ups and downs that go with it, because normal sex still "works" for them. This can lead to uncomfortable situations, though, when they let their significant other know of their other little turn-on.
For people who have it as a fetish, however, it can grant an additional degree of stability. Let's face it: significant others can have fights or break up with you, and leave you feeling terrible. They can make your life a real roller coaster ride. Diapers don't do that. Granted, stability is often what diaper-attracted people are looking for in the first place, and may have subconsciously pushed them towards diapers.
For me, it is a fetish. I don't necessarily like it, but it's the way it is. Do I wish I was normal? Hell yes. I would give nearly anything for this to go away so I could have a girlfriend and a family. And yet it is a foolish pipe dream at the same time, and maybe this is for the best. I don't do well in subtle social situations. I never have. I miss subtle cues and say the wrong things at the wrong times. I don't do well with remembering things like birthdays. I know I would royally screw up any relationship with a girl, whether or not I had perfectly normal sexual attractions or not. It boils down to the fact that I'm screwed up in more ways than one. At least diapers will never shoot me down when I screw up. I guess that's a positive benefit. . .