The hysteria surrounding age gap relationships is predicated on the fallacious notion that women are as mature as men. In reality, there is no huge gap between an 18-year-old and a 30-year-old because women do not mature past their adolescence.
"Women are eternal teenagers." This quote has been passed down from generation to generation for a reason.
Women are not as mature as men, so what practical difference does it make if a 30-year-old man dates a 20-year-old woman? What practical difference does it make if a 25-year-old man dates an 18-year-old woman? Only feminist harridans see something wrong in that.