Yes, there is.
Anything that gives favorable access/information to one group over another, is unfair.
The markets will do what they want, regardless. But once you let one group benefit over another, where does it stop?
You end up with Big Money controlling "propriety" market information (once public) and the retailers/small guys left holding their dick.
I learned to trade on FX. Took me 7 years. Probably 'have took 4 had I had access to proxy volume, level 2/DOM, and order flow. This is no different.