I don't know if I agree with that sentiment. I think there have been many cases of park lands that dead end, and it does make an impression on people that isn't as favourable.
From a design perspective, and how design effects the psyche, I think dead ends can create frustration (perhaps without intention) and disrupt flow. I think they can work on a small scale and used sparingly, but many parks have had to go back and fix these types of designs.
I don't know if this will be the case, but I am interested to see how it works and feels once the park is up and running. If it becomes an issue, I assume they'll end up having to correct it.