Just because each block has had gigawatts of computing power thrown at it doesn't make the block's contents correct, or 'the truth'. Case in point: every stolen

Just because each block has had gigawatts of computing power thrown at it doesn't make the block's contents correct, or 'the truth'. Case in point: every stolen bitcoin or ethereum wallet. The blockchain is storing the wrong owner of these coins. Every hack can be considered a forgery, and the miners will happily validate it.