@.access:
We are talking about the top pirates of the world. And not goody goody pirates, they are piratey pirates. Do you really think if Kaido found out a fruit he wanted was already eaten by a random person, he would just say "oh well, it is what it is" and go away? He would just kill the person and harvest the fruit (we saw with Caesar a person there are cheats to respawn a fruit next to you).
To be honest, I think phoenix_fire is right and this is matter one is supposed to simply think it is a theme an leave at it (I don't think it is as bad as every character in some manga being baptized with names that somehow will perfectly reflect their future lives, but we never bat an eye at it), but if we really need an in-universe reason I don't think it is really hard to believe both Linlin and Kaido would use force on top of their connections to get a fruit they wanted.
Well Linlin most likely cannibalized someone to get their DF (albeit unintentionally) so yeah, literally nothing will stand in their way at that point.