I feel like I read this differently than everyone else so far. Like, basically the man/alien who has no actual stake in the decision ceding the decision to the women/humans who do.

I guess that it can be read either way but, even with the Doctor leaving them to make the decision, he basically admits to Clara that he did so just knowing that she would make the correct decision in choosing life. It made me a little uncomfortable because there was such a heavy subtext of that egg being a baby and you can't just kill a baby

Also it bothered me when the Doctor took off, he didn't have to make the actual decision for them, but he could have been idk hung around and been a little supportive :( Clara has always been there for him in the past, in moments like the 50th special when he had to make the tough job of whether to pull the level or not, so I could understand her finding the Doctor's attitude paternal and condescending in abandoning them to make the decision in the belief that it would be the right one