You misunderstand, I didn't say I would only vote for Sanders or Warren, I said I would not vote for Biden. There is a difference.
I would vote for someone who won't touch social security and medicare while trying to fix stuff, I won't vote for someone trying to cut them.
And you try to blame the Bernie or Bust crowd and not the actions of the DNC and Clinton that created them to begin with. I wasn't even a member of them and was fully willing to back her Clinton till who actions with DWS where she hired her directly into her campaign after being forced to resign from the DNC chair for her actions. Don't blame the bernie crowd for that, blame Clinton.
The DNC in action in 2016 created that mess and cost them the entire thing because of it.
Now, I will gladly support a candidate who isn't Sanders or Warren if they actually try and fix stuff, but I will not vote to make sure worse and go for a big bad just because I have a bigger bad at the other side. And that isn't saying I am waiting for the perfect candidate either. Just not one who actively fights against the will of the their own voters thinking they have it on lock down.
The DNC needs to learn to actually listen to its voters and not trying to think they are owed the votes and largely ignoring and placating them in favor of donors. Then maybe they can actually get donations largely for their voters who actually support them instead. Or turn to public funding and cut all donations out outright.