He is good at his points. He simply says that he doesn't understand bitcoin or the blockchain technology and hence he is not going to invest in it. There is nothing wrong it that. If you don't understand anything, its better that you stay away from it.
Stay away tell bad things about it? He's too conservative and has made his way to success and I respect his points about it.
They are not that stupid. I am sure that somehow they had certain amount of Bitcoin to HODL but they don't admit it that they have it.
Like Elon Musk, I don't believe him just only have 0.25 BTC.
Likewise, they don't want people to get wealthy so they also analyzed it before discouraging people.