I mean, I literally said in my post "democratic primary", where last time Clinton had a big edge over Sanders with women, and where there was a large turnout gap in favour of women.
No-one has a perfect profile here - the two leading contenders with a national profile are over 75, Beto will have to break through without statewide office and less publicity for the next year, Warren isn't particularly well liked by either the establishment side or the Bernie side, midwesterners like Brown and Klobuchar still aren't particularly well known despite popularity and strong results back home, and Gillibrand and Harris can both be painted easily as coastal elites.
The fact is, until some big endorsements start flying in and we get some evidence of how they deal with a national audience, we have little idea of who's viable and who isn't. If Biden announces he's running next April and Obama endorses him, it's pretty much done already barring a scandal. Aside from that, it's all open to anyone that can make a big play.