I have explained two ways in which it can matter. So if you want to say that it doesn’t matter, you have to give some arguments against that. I will summarize for your benefit. The first argument reference the fluctuating nature of a fertilized egg, which lacks individuality in the early stages of development. Divisibility (monozygotic twins) and fusion (chimera) are not properties of an individual. Individual means indivisible. The fertilized egg is divisible, therefore it is not an individual. The second argument reference the lack of mental properties of the embryo and fetus, which means that a human life is not a person in all stages of development. A human life develops into a person, but is not a person from conception.
Every word is defined by humans, and so we have chosen the meaning, but that is a trivial statement. I don’t think you could give a rational definition of personhood which excluded myself, but I am happy to see you try. Now, you say that this only comes up because one has lost the debate about the beginning of human life. Is this claim historically justified?
As I say, I don’t think there is a discussion about when human life starts per se, but rather a discussion about when that life solidifies into what could be seen as a single entity (presumably some time after chimeras and monozygotic twins can no longer form). Additionally, there is a discussion about what kind of human life this embryo or fetus is - what properties it has and why that matters.I have given several arguments, and you would have to address those before dismissing them.
There was a discussion about Paul Ryan’s character due to his support of the ideas of Ayn Rand, and some said that being pro-choice showed a similar lack of moral character. I disagree and argued against that.
What’s the point of saying this after I have made several arguments against the notion that it’s arbitrary and subjective? If you want to claim that, you have to rebut the arguments made. That is how discussion works. Discussion is not about one side giving several arguments, and the other dismissing them without countering.
And how can having a mind be arbitrary? Don’t you think it matter if humans have minds?