If 5200 lbs is your unloaded weight, you are probably pushing 6000 lbs loaded.
Average tongue weight being about 12.5 percent of loaded trailer weight, would be about 750 lbs.
When you hang that 700 plus pound on your rear axle, it takes a significant amount of weight off your front axle. That reduces your steering control. If you had to make an evasive movement, that loss of steering could be enough to cause an accident. The primary function of a weight distributing hitch, is to restore that lost weight to your front axle.