I am uncertain why someone would choose to figure out what other people’s area of expertise is from Twitter. Most people’s Twitters contain their political opinions—as you point out—and do not contain their CV.
If you look at her LinkedIn, which seems to me to be a more appropriate source of information about her expertise, you’ll discover that in addition to being the current program officer at OpenPhil specializing in criminal justice (which is presumably why she was asked), she was also a former advocacy and policy counsel for the ACLU specializing in ending mass incarceration and a lawyer who specialized in holding police accountable for wrongful convictions. This seems to me like a person who does, in fact, have informed opinions about ending mass incarceration.
I’ve also found that sorbet hits the sweet + cold buttons and I tend to find it tastier than soy or rice milk ice cream.