That is true, but there is actually no need for anyone to be a whale in this system.

People mostly are whales through being around in the early days. A whale is someone who has a lot of wealth, whether it was earned in this system or bought doesn't really make a difference. The more power a few individuals have the greater the risk of an attack vector.

We don't know who some of these whales even are, they could be the same person. There are a lot of whales who never say anything/post/comment/etc.

I have more confidence in this current system than I did with Steem. I would have more confidence in this current system if more people powered up and more whales powered down. Some might argue that we are already decentralized enough but I don't think we are.