Nope, it's due to the fact these come from the period after the samurai had changed from soldiers to aristocratic bureaucrats. It's doubtful any of these saw a single battle.
They may have seen battle but if so as commanders from the rear where visibility to the troops was paramount. If they had seen actual close combat those elaborate decorations probably would not have survived. Also, there were many plainer helmets at the exhibition. I think a samurai expecting real combat would have chosen one of those.
I'm under the impression that samurai only wore armor in real battles and never for ceremony (preferring other, equally elaborate garments for that). This is in contrast with medieval Europe where there are many examples of elaborate, ceremonial-only armor (such as full suits for children of royalty, etc). Can anyone confirm?