Should a person practice Thai-boxing? Should a person do karate? Should a person go to Japan to learn aikido? Answers to should questions vary from person to person and whether one should study aiki-jitsu, IMO, can't be a general 'person' question.
Have no idea what aiki-jitsu looks like, myself, but I'm sure enough you could learn something from it, especially as it has certainly inspired Ueshiba. Then again, you could learn stuff from Hapkido, TKD, Kung Fu, etc. there's no should about it. Study aikido if you like. Study aiki-jitsu if you want to. See what comes of it.
Tell me too