@Jazzhead
Our current Government can't pass legislation because the voters are divided and the people they elect are divided. Passing an amendment to the constitution is harder still, but I think I understand your main point as "politicians/governments will only do what the people allow them to get away with." The problem isn't the laws, the problem is the people, and on that I agree.
The problem is we the people, but only insofar as we don't demand more from politicians. Politicians are obsessed these days with partisanship and all the obstruction and warfare that implies, not the passage of sound legislation. And perhaps politicians are tribal because people more and more these days are tribal. I'm sure you've seen studies showing many of us don't marry or socialize with members of the other party, nor do we listen to news other than from media outlets that reinforce our biases.
And there's no other issue - not one - on which the people and the Congresspersons they elect are more tribal and uncompromising than the issue of abortion.
So we've had 45 years to pass a Constitutional amendment to address the matter of abortion, and we've failed to do so. And I doubt we ever will, so Roe v. Wade will remain the law of the land, and women will have the right to control their own destinies.