If you get a big enough group of people there are going to be some people with machiavellian tendencies or at least some that read bad advice on the internet about how to get ahead at work and try to apply it with clumsy gusto. You will look like a real fool to your boss the CEO if you are giving information to these type of people and they try to use it for their benefit.
I may be painting too dark a picture due to the focus the comments have on a single sentence. Overall I had good relationships with the vast majority of people that worked for me. I know this because I still have contact with most of them even though we have almost no chance of ever working together again. You are deluding yourself if you think there are no bad apples out there or that people having problems in their personal life may try to pull manipulation at work to get ahead or however they see may solve their problems.
You need to read that sentence again. Your comments are very revealing about you and not about CTO level work as you are imagining.