When members do not have a way to change their opinion and save face, they won't change their opinion.
Politico should have been more thoughtful about its disclosure if they preferred to see changes because now the names on that opinion will never change and we could very well see the exact language become the published opinion.
They are humans that have to live in society just like the rest of us. No one is completely invulnerable to society. I imagine being the target of some of these radical abortion groups (anti or pro) would be scary, especially for officials that are normally not in the limelight.
Pro-life / anti-abortion people believe that a fetus is a unique human life; from their perspective, that's 60 million murders committed against the unborn.
Of course, for any who do not think a fetus is a living human, it is a hollow argument.
These are federal supreme court justices that rule on often (by the nature of the cases they receive) controversial topics constantly. It's not a position you take if you value privacy.
I'm sure now it's especially dangerous, but I don't think this is a novel factor in their life at this point.