Simple concepts. I believe no one in here is for killing people with mental disabilities. As societies we've come that far at least.
(We give parents who are about to have such a child a slightly longer period to decide if they are willing to go through with everything that entails, or have an abortion. Because if they turn neglectful, or angry and harmful towards it,bad scene. Again - compromises for more difficult psychological decisions. But for that you first have to acknowledge that abortions arent the worst thing that can be.)
At one point human beings are bunch of cells. Then the are more, then they arent any longer (when they die hopefully of a natural cause). Now what some people do are dealing with the 'in between phases' in kind of a way to minimize harm.
Also - rational people invented the universal declaration of human rights, and thats the 'best' you can do - in terms of actual enacted humanity in todays scene. Better than "love thy next".
Lets go at this poetically.
So - human is love. After humans died, are humans still love? People learned that no - at least not the body, because deceases (and death cults).
Now when do people become human beings with inseperable personal rights? At conception? (Which the church didn't know existed for the better parts of several centuries.) While they are still part of the female body? Something in between.
The new "law wave" (meant to trigger constitutional debates at a time where you have a majority of center right laywers on the constitutional board) is meant to trigger at "the first heart beat". Thats very poetical. But not much more.
What most people came to realize was that having a child, while by no means wanting it - kind of iduces suffering for both the 'childbarer' and the child. And the family of that child, once it grows older. So some not at all fuzzy ("all is love") decisions were made. That took into context that - if women killed themselves, or where willing to mutilate themselves severely - just to not have to go through with a pregnancy - that wasn't _it_.
Now your argument is "but now its too easy". From which point forwhat we now do what? Hold debates over when its just hard enough? Set poetic rules that define human beings as such from the moment of the first "heart beat"?
Also - and this is something you have to deal with. Humans kill each other in wars. They do so whenever there is an issue with not enough food, or place to make a living, or if some god tells them to, or when the bad guy gets a weapon they dont like. That also produces harm, thats generational.
The sentence that now follows, would make you climp up walls, so I can not utter it - but think of the concept at least.