You make an impressive presentation. I suppose our disagreement is on the efficacy and the question as to why throw away another tool in the fight.
If the framers thought abortion or Same sex marriages were going to come up they would, no doubt written the constitution with less ambiguity. Such things were likely unimaginable in their epoch. I am sure that they could not even envision the world in which we live. The law provides for amendments so why discard it as a tool? Quite simply, we aren’t going to defeat this inherent evil by throwing away options, parsing words and rationalizing that abortion is anything other than evil.
I do not disagree with anything in your post. I wish that our Founders had seen a bit into the future... for a lot of reasons... abortion being number one. Like you said, they would have a fit if they knew where liberalism has taken America today.
LLS