In MF, main villains were navy. Did navy lose there? Did any admiral lost an importance there?
So, just because Elders are villains of egghead doesn't mean they won't have importance in future or they will lose at egghead
Rules have no meaning if you ignore the context to suit what you like
Nah, dude, don't talk to me about Luffy's Solo Arcs
We are talking about Straw Hats Arcs
Navy weren't Villains of MF Arc lol
They were just defending their Home
Luffy is Warrior of Liberation, if an Island or Location needs Saving, then those Villains are gonna be Defeated, as simple as that
Shells Town was Freed from Morgan
Orange Town was Freed from Buggy
Syrup Village was Freed from Kuro
Baratie was Freed from Krieg
Nami's Island was Freed from Arlong
Drum Island was Freed from Wapol
Arabasta was Freed from Crocodile
Skypiea was Freed from Enel
Florian Triangle was Freed from Moria
Fishmen Island was Freed from Hody
Punk Hazard was Freed from Caesar
Dressrosa was Freed from Doflamingo
Wano was Freed from Kaidou
This isn't an Arc where it's Luffy who is Endangering the Peace of that Location such as Loguetown or Whole Cake Island or Impel Down or Marine HQ or Amazon Lily
This is an Arc where it's Gorosei who wanna take Mother Flame, Kill Vegapunk, Ruin his Last Message, Destroy his Life Research, Kill Bonney whom He cured & gave Power over Pacifista ... etc
If you think Oda bothers to bring Massive Army, CP-0, Kizaru, Pacifista, Seraphim & on top of them all Gorosei
And the only thing SHs gonna accomplish is giving Lucci New Scars, then i don't know what to tell you