I totally agree with what you are saying Steel. But at the same time it can't be under valued how much money plays into the race. With Warren and Sanders dominating among people who donate under $200, Harris needed to appeal to big donors.
Keep in mind that Pete was mentioned as the person that had dinners with key donors like Bernard Schwartz, that also included Pelosi, Schumer, McAuliffe & Neera Tanden. Harris was never apart of that conversation(as far as we know), & those conversations make Pete a non-starter with anyone who is keeping track of what is happening(aka people who are donating under $200 to Warren, Sanders & to a lesser degree Yang). This is a major part of why Pete only stands a chance if he someone wins over a majority of 65+ voters, who vote in the democratic party.
So Pete's only chance is winning the first three primaries and a narrative being formed and reinforced among mass media about his inevitability. This narrative is something which people donating & volunteering for Sanders & Warren will never buy into. So at some point either Warren or Sanders will need to drop out and make the other their VP choice.
If he loses Nevada, it will take the wind out of Pete. South Carolina, Texas and California will follow.
SC & Nevada is where Biden's campaign will invest the most, even if he is 4th in both Iowa & New Hampshire - this is where Biden takes his last stand.
Bernie's campaign is already signally they are investing 30 million into the 4 early states and California. They have not been burning through their cash-on-hand but now are seemingly going to flex their financial advantage.
Warren also has very good organization in all 4 early states, her main issues is Super Tuesday. I think she will be 2nd on average across the 4, but she needs 3 wins to make it a two person race between herself and Bernie before Super Tuesday.