You are right. It's dumb but Luffy could likely win against the rest of the crew.
If we break it down a bit only Zoro can seriously injure Luffy with AdCoC + swords.
Jinbei and Sanji lack CoC.
Jinbeis CoA is perhaps comparable to Luffys while Sanjis is weaker.
Luffy can take blunt damage and restart his heart, Zoro has heart but unfortunately his body shatters after a few Gear 5 hits.
Basically Zoro can give Luffy a good scar but apart from that Luffy sweeps unless they somehow subdue him as a crew long enough for Zoro to cut off an arm or so. Kind of like Oars-fight.
If we break it down a bit only Zoro can seriously injure Luffy with AdCoC + swords.
Jinbei and Sanji lack CoC.
Jinbeis CoA is perhaps comparable to Luffys while Sanjis is weaker.
Luffy can take blunt damage and restart his heart, Zoro has heart but unfortunately his body shatters after a few Gear 5 hits.
Basically Zoro can give Luffy a good scar but apart from that Luffy sweeps unless they somehow subdue him as a crew long enough for Zoro to cut off an arm or so. Kind of like Oars-fight.