By that logic, you wouldn't let a specialist treat you for cancer, unless they'd had it themselves?
Surely that's the last thing you need one for - what you might need is help to sort out your feelings, to understand why you think as you do, in order to find your own answers.. That's what therapists are trained for?
They're supposed to be professionals and to have been trained (you checked licences, didn't you?) - whereas on here we are neither, generally?