That's a very dismissive and unrealistic statement. There are plenty of investors investing in things such as AI and crypto out of FOMO who either see something that isn't there or are just pretending to see something in the hope of getting rich.
Obviously, there are plenty of investors who don't fall into this situation. But lets not pretend that just because someone has a lot of money or invests a lot of money that it means they know what they are doing.
I suppose my phrasing was a bit harsh at the end. To be clear, I mean that it doesn't mean they know what they are doing on every investment. Investing misses happen! People are wrong!