That is a insanely stronger Piccolo than start of DBZ, and even then, the island is not destroyed there.
Dragon Ball characters do not cause unnecessary destruction 99% of the time.
Yes, indeed, but we are talking about an isolated scenario. Number 18 was sitting on that island, so there was no reason for Piccolo to destroy everything completely, and it
is in fact a stronger version.
However, when we look at the Logias, they can be harmed by their elemental weakness. So technically, what comes to Piccolo’s mind when facing someone like Akainu, who is made of magma, is to throw water on him to put it out. If he’s facing someone like Aokiji, then fire to melt him. A giant tree (Green Bull) — fire to burn it,
if nothing else he tries works. And ki blasts are hot; Cell used that to melt the time machine he used.
If I’m not mistaken, Goku and Gohan used ki blasts to cook inside the Hyperbolic Time Chamber.
So the only problem when it comes to the Admirals is Kizaru, who can be very well restrained, and technically, if Piccolo tries the direct weaknesses of the others, he’s also going to try all of them on Kizaru — water, fire, hot ki blasts — and then it will work.