Bullshit. None of the other crews flaws puts them on a position to neglect the other Cree members.
Luffys flaw: acts dumb and loves food. Has not placed his crew in harms way because of these flaws.
Zoros flaws gets lost amd drinks. Him being lost is a gag that helps him finds things etc
Robins flaws - can't think of any
Frankya flaws- can't think of any
Jinbes flaws - none
Ussop flaws - being weak and a coward but would still put his life on the line and has saved the day several times
Namis flaws - to kind against children and love money. The only time in which nami loving kids was a flaws was against the seraphim. A one time occurrence is way better than sanji several occurrences with the same flaw (women)
Sanjis flaw - not trusting in luffy which is why whole cake was dragged out, has low self esteem to the point that he placed his crew in danger, loves women to the point that he doesn't even defend himself against them which made saving Robin take longer, which placed Robin in a fight against bm with everyone now knowing her location which made it worse for Robin, could have potentially been the death if Robin had brook not been there