My non-religious position
"killing an innocent human life is always wrong because we have to choose some sort of moral standard" isnt very good at convincing someone of pro life.
Instead I like to focus on the future experience of the being. Abortion isnt wrong just because some sort of magic human tissue is being destroyed, but because a lifes worth of an experience is being taken away. A fetus isnt the only thing being murdered, but also a child, an adult, and an old person. A minimum of 20% of gen Z has been aborted. One of every 5 people you know may not have been here, and it makes no difference whether they are murdered now or in the womb, the outcome is the same, and no one has the right to do that.
Id like to hear any potential criticism