Let’s say (for example) my views includes socialism, pacifism, and a who bunch of other “isms” that I find good, but does not include theism Why pick the one ism that describe the negative (rather than all the other isms that describe the positive), and call that my worldview? IOW why not call it a socialist worldview, or pacifist worldview etc.?
Who's picking just one? All the applicable labels apply. The label that's most important will vary by context.
But if atheism is such a non-issue concerning my views, why make it the center point of my world view?
Who's doing that?
Why not pick something that is far more important to me than imaginary creatures that rarely cross my mind, to be the name of my world view?
Indeed. That's why if I'm asked what my worldview is, I'll usually describe it in terms like "freethinker," "skeptic," "humanist," etc.
The only time the term "atheist" really comes up is in conversations with theists who find my lack of belief in gods important because of their worldview.