Since nothing really happens, isn verbal abuse harmless?”
No. Verbal abuse can be just as life-threatening as a loaded gun. If you are exposed to chronice verbal abuse — whether as abuser, as victim, or as an innocent bystander who doesn’t have the option to leave the scene — you are in danger. The major risk factors for all diseases and disorders, across the board, are hostility and loneliness; the only “cure” is better language.