There's nothing wrong about being organized in itself. Problem is, men step in as leaders.
Of course, they're just Christ's vicars on earths, ministers to their brothers, shepherds to the sheep. It doesn't take long though, before those well-intentioned men start going against Christ's words: "But you , do not you be called Rabbi, for one is your teacher, whereas all you are brothers. Moreover, do not call anyone your father on earth, for one is your Father, the heavenly One. Neither be called ‘leaders,’ for your Leader is one, the Christ."
Just the expression "governing body" is enough to summarize the problem with the WT organization. They don't just govern an organization, they govern minds and hearts as well, forbidding freedom of though and expression, and directing individual consciences.
The long list of WTS scandals, failures and cover-ups is the best testimony to the dangers of such-like organization. Fred Franz himself made some interesting remarks on first-century christianity, which you may find in Ray Franz' book "Crisis of Conscience".