If they simply try to avoid the issue, it's clear that they have something to hide. It's not hard to deduce that they are already aware of the relationship between the Zhang family and the pirates.
In that case, the Zhang family will surely act as quickly as possible, and the three major families of Jinling will likely not be able to resist them.
On the other hand, if they pretend not to know anything and go onto the island anyway, who knows what tricks the people from the Zhang family might use?
After all, it was the Zhang family who sent the pirates to attack the ships, which means they have been eyeing Wang Yue and his group for a while.
Out in the open sea, they can simply block the signal and act whenever they want.
