This "blockchain is good, bitcoin is bad" argument, is so pervassive. I see it daily on all my reviews of mainstream media says about crypto.
This suggestions is proliferated, as I see it, through the mainstream media by "expert" economists who value traditional economic systems and have a stake in seeing that those existing systems continue their dominance. It is easy to see how an experienced hedge fund manager who is making his clients 8% annually would feel defensive about Bitcoin's performance. Add to that the difficulty in comprehending a new technology, so I understand why some of these guys/girls just never try to understand Bitcoin or blockchain.
Instead they simply dismiss it, and allege Bitcoin is a bubble, it is a ponzi, it has no use or value. Without ever reviewing, using, or taking the time to understand how it works and what value and function it serves now, and how that might expand in the future.
In 2018 people are going to start getting it. It's not going to end right away, but in 2018 people's lives will start changing from the wide spread adoption of crypto, including Bitcoin, but certainly others.
The problems starts when the fat lady sings. Then you'll want to watch she doesn't fall on you.