Lol! It's a free world where everyone's freedom of speech is protected by law. So such kind of opinions will keep on coming. We can't sensor them anyway! But we can surely ignore them! We have successfully ignored Jemie Dimon, Warren Buffet etc. One more name to add to the ignore list!
Seriously, when someone says that Blockchain is a spreadsheet, it shows the level of understanding that person has on this technology. It's like proclaiming to the world - see, I am a stupid!
Yeah, if only others would have the ignore list like there..
I do agree with you, everybody can say what they want or believe in, however, it wouldn't make things different regarding the cold and proven facts.