Sorry, but that's complete and utter bull-jive. If these dreams are simply afterthoughts outside of Luffy's, then what was the point of the "Barrel Scene"? Where these characters expressed their dreams to each other with so much glee and determination on why they've became the Straw Hats. Or when people like Sanji showed such a passion of the All Blue, and spilled his heart Luffy about it? Was all of that just a farce this whole time? What was the point of all that build up if the dream are nothing more than stepping stones for Jesus King Luffy? It may be reality, but its also poor writing.
Mate you said it it’s reality.
The important thing for Oda is making them achieve their dream it doesn’t matter how some fans feel about the way it’s done. And yes they are only just stepping stone in comparison to Luffy’s goal just by looking how Oda has been treating their dreams from the moment they joined till now.
Sanji’s all blue? Nothing has been done about it and was only mentioned few time.
Usopp’s? Barely any note worthy change.
Chopper? Lol don’t even need to talk about this.
Zoro? Only thing done is Zoro stating he wants to be WSS every few arcs yet no challengers appeared and it’s only Mihawk.
Fact of the matter is some their dreams is gonna be achieved by story progression and not them going out of their way to step up and do it.
Only Luffy’s dream that gets the work and development to make it happen.
let’s not act like one piece and Oda is a different breed in comparison to most stories/manga’s.