Well that's one good reason for diapers. There are other more common variations on that theme though, skiers, astronauts, divers, construction crane operators, etc, all benefit from diapers because they simply don't have the time or opportunity to undress. I saw your earlier posts regarding asthma... I'd have expected those sort of symptoms to be really mild living that far North, with pollen season being pretty short.
I'd imagine some other people would have simply chosen to stay inside if going outside was going to require a diaper - so in that regard you're lucky you have the option to extend your time outside