No. They did eat fish. They used the trees to make large rafts to go deep sea fishing. And they used trees to roll the statues around on the ground. Eventually, they had chopped down all of the trees and could no longer go deep sea fishing. Their economy collasped. When the white men arrived the natives were already close to starvation and were fighting amounst themselves. Reminder for the future. Always re-plant trees after the harvest of mature trees. Keep making more trees. Replinish the resource.
It is rayciss of you to enforce your white, Eurocentric values on those peace loving cannibals.
As an aide, I am currently trying to make an Easter Island head out of Legos for my kid. It is not as easy as I thought.