It's important to not nominate a sure loser, but, historically, "electability" arguments have been used to discourage women and minorities from running.
Warren's plan includes proposals for the elimination of student loan debt for most students, an expansion of grants for low-income students, and free public education.
We get upset when politicians from the other party act in ways that defy our moral values. When someone from our own party does it, we're not always so concerned.