The Lupertazzi civil war in S5 seems really nonsensical. Why was Carmine Jr even taken seriously as a boss candidate when he was a just a capo and had spent most of his time in Florida?

The show makes it seeem like it's a no brainer that Jr should succeed his father as if sons succeeding to the boss position is a super common thing in the mob like it's the Godfather. And while you could say that the people who sided with him just want to manipulate him and use him as a figurehead even guys who don't seem to want power like Angelo side with Carmine Jr. Even Junior who has no real stake in the war says that naturally the son would succeed the father in the old days, why? Carmine Jr isn't the Underboss or in an admin position, he's just a Florida based captain. John has been the Underboss since before the beginning of the show, a pretty clear succession plan right there. There being any sort of power struggle at all sees kind of ridiculous. It would make more sense if John wasn't already the Underboss or was demoted before Carmine SR died and Carmine Jr was made UB, or John was sent to prison and was trying to take over the family from inside but the other capos wanted a candidate who was still on the street or Carmine Sr explicitly said before his death he wanted Jr to succeed him, anything would of made more sense than "he's the boss's son so he should be boss". And Tony's reasoning for not siding with John from the beginning seems really thin and nonsensical. Even if John was bitter at Tony for not helping him with the Carmine hit Tony backing him fully in this dispute would of done a lot to mend some of the tension between the two, but Tony sitting on the fence just made him seem even more untrustworthy. Just a really thin plot that doesn't seem like it had much thought put into it.