How often did Jesus talk about abortion? If he can get away with talking about “issues other than abortion”, why not his followers?
Have you heard of the term “consistent life ethic”? The idea behind it is that to be anti-abortion is not the same as being “pro-life” in the comprehensive sense of the term. The baby that is in the womb today that you’re fighting to defend the life of may be in 20 years become the young, single mother who becomes a porn actress to get her way out of poverty. So yes, the issue of poverty matters a great deal.
That baby in the womb may be the child of a father who just got deported, so yes the issue of immigration matters a great deal.
That baby in the womb may be the child of a meth addict mother may in 9 months be born with a method addiction, so yes the issue of substance abuse, drug smuggling, and transnational drug organizations matter a great deal.
Abortion is gravely evil and the focus or emphasis you see given to it is because of that. I don’t think the focus is misguided provided that it doesn’t involve ignoring the fact that abortion doesn’t exist in a vacuum, that there are many social factors that contribute to a woman’s decision to have an abortion, and not just the mere fact that it is legal.
So yes, addressing things like economic justice, immigration, health care, substance abuse, employment, is warranted not only on their own merits, but also because of how they relate to the “choice to abort”.
Making abortion illegal doesn’t magic away the social conditions that influenced women to have abortions in the first place (abortion being legal doesn’t mean a woman is required to have abortion, but only that she is permitted to by law if she chooses to have one).
In theory, it is possible for abortion to be legal and for no woman to have an abortion.
In theory, it is also possible for abortion to be illegal and for women to still have them.
So, if our goal is not just to make abortion illegal but to reduce the actual number of abortions (legally or illegally procured), then we most certainly have to address policies that may --taken in isolation-- seem unrelated to abortion, but in reality are interconnected.