Hell, no. I'd rather do a job that I like and don't feel horribly comfortable in. My stammer relatively mild these days, but I still hate talking to customers on the phone. There's persisting and developing resilience on one hand, then there's repeatedly traumatising yourself on the other. I'd commend anyone who sticks with it and learns a lot in the process, but if it's just causing distress, I'd be getting out.