Is there any publicly accessible evidence (blog posts, FB posts, etc.) about Christine Ford's pre-2018 political views?

If it is on record that she had a history of anti-Trump and/or anti-Republican/pro-Democrat views before Kavanaugh's nomination, then it is more likely than she made a politically motivated false claim than if she hadn't taken a political stand before the Kavanaugh affair.

Why would she, a doctor with a PHD, care about who gets nominated to the supreme court?

Check out her website. It probably says there

People who make false claims do not submit to (and pass) polygraph examinations. They also typically do not demand full investigations of the allegations.

She was telling the truth, deal with it.