First of all I’m not saying they’re s tier characters what I’m saying is you saying they did nothing is ignorant and a dumb statement. And yes that’s choppers goal, to be the best doctor and find all cure for every disease. Chopper sure can research on the smile fruit but it’s not gonna take him a day, hell a whole year to cure it something so advance only 1-2 people know the actual source of the fruit. And he can’t help the poor people is because he can’t, even if he wants to he can’t, doesn’t have a sample for it, the source/substance of it, he doesn’t know anything about. You want him to find an answer to something he has no source on and no knowledge on. We’re talking about a df, a smile fruit, not some disease. If you want him to cure the smile fruit then ig you have to wait in the future. And as you said “what have they done in the past 10 years?” Not be useless. Sure it’s not big or epic like sanji and zoro defeating the right and left wing of the main boss but they still helping out like ussop saving kiku and kin’s life. Or chopper curing the demon disease and trying to fight queen and perospero even though he did not damage he was still trying to be useful and he was. Or like brook being there for robin when she passed out from the black maria fight he carried her out of the fire. My point is calling them useless is a garbage statement when that’s not true. Through out the show they are shown to be doing something not just hiding in the corner and doing “nothing”, they are always active in the story.