User blog comment:AYET/Weak willed people in NW/@comment-3425840-20130206131138

The first thing is, not only strong are in New Wlorld, just like in paradise, New World also has natives and general folks, they are not necessarily strong (e.g. Lola's crew).

Relatively weaker people can survive by allying themselves to stronger crews.

As for getting knocked off, it is not only about weak or strong will. According to Oda's explanation in SBS, the respective power difference is a important factor. I think no matter how strong someone's will is, if not backed by some physical might, he/she would be KO (note, a crew mate of WB said that one has to be strong in both body and mind to stand in Shanks' wake).

Also if someone is not that strong willed but is physically immensely powerful, I think he/she can also resist HH.

G5 maybe tough but their gap of strength with DD is so huge that it did not matter, same with random crew mates of WB with Shanks.