Let me include another part of the article:
Despite his bullish view on the future of tokenization, the CEO said he believes that most cryptocurrency-related companies “are not going to be around” in the future, though he did say that blockchain technology will be “very important.”
The way I take the point of that views of tokenization is it will be hardly alike to what currently works. Extensive centralization and regulation acceptance will be required to incorporate things quoted on OP with blockchain. Do note that blockchain is the point in this case, not cryptocurrency.
In that sense, the current of how public blockchain being utilized did not align with what those companies expected, that is the reason why they favour tokenization in a sense of private blockchain. The reason might be simply due to how it can be easily integrated with regulation requirements.