When you consider that that “strategy” is what is MANDATED by Catholic moral teaching (and international law), the total failure of the Catholic bishops and the pro-life movement even to think along those lines is all the more shocking.
What happened is that the Supreme Court claimed that the Constitution protected a right to kill a baby—so the pro-life movement promptly proceeded to waste 42 years agitating for a Constitutional amendment.
Unfortunately, the March for Life is OFFICIALLY dedicated to the same strategy of barking up the wrong tree.
You’re absolutely right.
Of course, that ain’t the only wrong tree they’re barking up.
In fact, they specialize in barking up the wrong trees.
The "soup kitchen" model of activism, is and always has been, doomed to failure.