I don't think "just stop picking a side regarding abortion, gun ownership, or gay marriage" is a reasonable solution. These are political wedge issues, but they are also legal questions with answers that can affect your daily life. Of course you want it to go a certain way!
True! For example, I inherently have a bias towards wanting LGBTQ people to have the right to participate in society through marriage, anti-discrimination laws, etc because I'm LGBTQ. I suspect a lot of black people have a bias towards wanting anti-discrimination legislation so they don't get discriminated against, too.
Does that strike you as unreasonable?