Lott may be correct here. With the majority that have thrown their hat in the ring, they are decidedly more progressive/left. (Harris, Bernie, Warren) If the party shifts further to the left, a Centrist has a good chance of gaining the nomination. In addition to Biden, that could be Klobuchar too. Being from Michigan, it gives her an advantage in the general that others lack.
I know people like Harris, but CA doesn't get the Dems anything they don't already have.