But patriarchy is still alive and well. I still hear the stories of childless single (and even some married) women who have wanted to get their tubes tied and no doctor would do so because their future or current husband might object. That choice should be made by no man. It's hers and hers alone.
Now I will admit that marriage is a partnership, but early on my wife and I made a decision to permit either of us to veto an important, life changing, decision which affects us both (like whether to have children); so, unless we both wanted children, we would not have them (ditto for adoption). It's not perfect, but both of us agreed that it was not appropriate to make ether of us a parent without the other agreeing to it. We dd the same thing when we went through infertility treatments, and I was the first to discuss stopping them (for a variety of reasons). I do understand that this could cause problems in a marriage (or even end it), but so could unwanted parenthood (and that's even more unfair to the kids). I would hope my wife would discuss sterilization with me before she chose to undergo a procedure, as would I, but it is ultimately her choice.
Sure, some people regret their choices later on, but that is life; when you make a choice in most things, you basically erase a good number of available options, but that's part of living with the choices you made--be it choosing a profession, remaining single or getting married, having children, or any of the myriad choices you have available. You may get a redo on some, but some choices might well be irrevocable. Welcome to the real world.
ETA: When I worked for DYFS, I did find a number of times where a child wound up being placed in foster care rather than with his/her grandparents because one of them (usually the male) refused to accept custody. Now to me, that is something I could not do, but I do understand it, and if someone wanted to live the last few years of their life without being bogged down by childcare responsibilities, it is their choice (and I don't think the grandchild would be better off with them). Is it selfish? Sure. But so is taking on the care of a child you do not want just to please others.
FWIW, I can also recall a time when the grandparents split over this (made me wonder how good the relationship was to begin with), and the grandmother got custody.