You are pro killing every THING which doesn't have consciousnesses?
That's directed at someone else but I had to comment.
The answer is no. You're still missing the point of CHOICE. It isn't "pro killing". It's pro-options. And yes, someone who is completely brain dead can be legally taken off life support. Does that mean they HAVE to do that? Well, no. The family can opt to keep their body alive. That's their CHOICE.
So why would someone choose to do that? Well, sentimentality. They have a personal vested interest in the loving memories and interactions with that person, and don't want to see the last physical manifestation of that person go. Now a pregnant woman may experience such a connection to her fetus, in which case there is personal value to her to not terminate the pregnancy. However if she does not experience that connection, why should someone like you, who has ZERO actual vested interest in that specific fetus, actually have an ability to limit her choices and say what should happen?
This is the concept of "murder" that AllieBaba has been avoiding despite my attempts to strike up a conversation about it with him. Murder is wrong because it unjustly removes something that the person and their loved ones value: that person's life. Theft is wrong for similar reasons.
These concepts do not necessarily apply to a fetus.