It's not a religious thing, they're entering the political sphere. Even the Reform movement acknowles Halacha in their opinions on issues like abortion or homosexuality, then floats off into it's a modern world, and we know things the sages didn't, and who are we to judge.
They are correct that it's a legislative issue. I doubt they intended that condemnation of Rowe v Wade.
And while they may not grant "permission", women do consult Rabbis on personal issues such as abortion. IMO a Rabbi, irrespective of his political views, who doesn't explain the Halachic position on abortion in the context of that consultation isn't doing his job.
That is true but what the Conservative rabbis are saying is that, if the government passes laws outlawing abortion, it would interfere with their religious authority to grant abortion under certain circumstances.
That would be a legitimate position if
1) They actually had that authority
2) Jewish women actually followed it.
Don't kid yourself. A women is as likely to ask a reform rabbi about abortion as she is about eating shrimp in lobster sauce on pesach.