If we all think that our life experiences do not affect our thinking, we are living in a dream world.
We are all human beings and each have our own prejudices. No one is immune to any kind of prejudice. If this was not true, every decision on the Supreme Court would be unanimous. They almost never are.What you say is true, but we are talking about a Supreme Court nominee here. A Supreme Court Justice is supposed to impartially interpret the Constitution based on the letter of the law, not interject their personal prejudices based on their life experience.