Agreed, but, they don't need even 1/2 that much reason. The area I am in is "low crime rate" compared to many, and even so, one can hardly listen to a local newscast without there being at least one report of a felon arrested for some lesser charge than robbery through murder, but the felon / felons is / are also charged for possession of a gun. Most often the arrest is for drugs, in varying quantities, and / or starts off as a traffic stop.
Others may just have, or think they have, enemies who would harm them if they could.
Right, so the crime is not a deterrent for felons to purchase or carry firearms.