Presidents nominate the justices. They are the only way to change the make-up of a particular court.
Therefore, presidents are crucial.
Life is a God-given right. It is not an issue. You debate issues. You don’t debate what God has given you. No one has any authority for taking it away or even debating it as you would an issue.
I dont disagree with your last point. I just dont see any evidence that presidents have had any affect on abortion, specifically Roe v Wade, so for me, that is not something I use to judge a presidential candidate.