My issue wasn't that she voted that way. My issue is that she was advocating for others to do that as well.
So what? She had virtually no influence and most of the influence she did have was probably in New York, a safe blue state.
She probably had 0.001% as much to do with the result as whatever the weather was that day, and if the intent is your beef, she probably assumed like everybody else in the world Clinton would romp it in a landslide and all her vote would do is be an ignored historical footnote.
This is beyond petty as an issue.