I actually disagree with this.
I'll try and explain. Paragon suffered a great trauma and many areas were devastated. In fact the city was so wrecked that the city governors and/or national government had to segregate the city into zones with huge concrete walls and force fields.
I am not at this time interested in apportioning blame or reason for those decisions...
BUT....
It's great to be able to visit a zone, to maybe grab some XP, to explore, to chill,
maybe even to RP.
A zone can exist, simply because it is there. No zones need a defined raison d'etre - they simply need to provide in and out and allow players to make of them what they will.
Not every zone has to have stuff going on. We are so lucky that this game offers massive amounts of content and even after it shut down, more is being added.
Sometimes it's just cool to sit in a place that is dangerous and still come up smelling of roses.