What's the point of prolonging your life if you don't enjoy it? It's your body. Do whatever you want with it. Better to wear out than rust over.
People still think that a woman who doesn't have children or doesn't want children is really lacking in something. I've seen this over and over again in my life. I've had this thinking used against me repeatedly. I remember I had a therapist once, and I brought this up, and she said, "Well, I think women who don't have children feel very self-critical. They feel bad, so they think other people are critical in that way. "