Dave,
Not revealing sexual assault until many years after the event is not atypical or unusual. If you research this "delay time reporting" issue, you may change your view.
Here's one article.
https://www.nytimes.com/2018/09/18/us/kavanaugh-christine-blasey-ford.html
Also, remember Bill Cosby's and Harvey Weinstein's accusers? How long did that take? Answer, many years.
Best,
Gordon
PS: One of the reasonable issues raised was why she did not accept the Committee's invitation to come to California and hear her testimony. This would avoid the "public spectacle". I saw an interview with Dr. Ford's attorneys. They indicated that the Committee was going to send "staffers" and not actual Judiciary Committee members to California and that was not acceptable to Dr. Ford. As she said when she testified, she came forward because she felt it was her "civic duty" to do so. To repeat, she had nothing to gain by appearing and everything to lose.