Yes, there are now, and will probably continue to be, injustices in the granting of concealed carry permits. I live in Maryland and we are the epicenter of restriction of permits.
I am a firearms instructor, and one of the biggest lessons I can convey to anyone considering carrying a firearm for self defense is that it's something that you should pray you never use. In my state, the simple act of displaying a firearm in public is a crime called 'brandishing'. Even if it's still in the holster. There are only three conditions which allow for the defensive use of a firearm: imminent threat of death, rape or kidnapping. If a person brandishes or uses his firearm, they had better articulate one of those three beliefs to the law enforcement officers who respond. In MD, we are guilty until proven innocent, and even then it's a crap shoot.
It's different in some parts of the country, and armed self defense preparedness is considered the standard. I encourage everyone who is considering legally arming themselves to do their research, give more serious thought to that decision than anything else in your life, then act accordingly. If you choose to become armed, get appropriate training and practice, practice, practice. Not just punching holes in paper targets, but any kind of defensive/action events you can find. IDPA (International Defensive Pistol Association) has local events that combine drawing from a concealed holster, shooting at complicated targets, and moving in its drills. The NRA has certified instructors who teach Personal Protection in the Home, Outside the Home, and other classes designed to enhance a person's skills as well as decision making about shoot/no-shoot situations.
Using a firearm in self defense is an act that will change a person's life forever. Your life will never be the same. You may go to jail until the situation has been investigated. You likely will lose your firearm. You may have to spend thousands of dollars to hire a defense attorney even if you are not guilty of a crime. You may face civil suits from the criminal who attacked you (if they are alive) or from their survivors. And the list goes on. The only benefit (that you should articulate to anybody) of using a firearm for self defense is that you will still be alive. Your life will never be the same, but you will be alive. It is a personal choice that only you can make, and it isn't to be taken lightly.
For many of us, we believe that it is better to have the chance of saving our own life (or the lives of our loved ones) than to simply surrender to whatever a criminal chooses to do.