You're putting words in my mouth in order to change the subject to one you're more comfortable with. In this case, the subject you're more comfortable with is gloating that AIPAC bought you some pro-genocide primary challengers.
The subject is: “why do progressives think they know how to win elections better than the DNC if they have never done so?”
To which I provided an explanation. They cannot win elections that the party makes certain they can't run in. Now enjoy the results of the party's recalcitrance.
Which applies to the party that lost to trump twice as well. In addition, the general election doesn't have the party putting its thumb on the scale like the primaries do. If the party deigns to have primaries at all.
Nobody "lets" someone win an election. Progressives need to earn their votes like everyone else. And if they earn enough votes, then they win regardless of what other Democrats think.
The party prevents progressives from winning if they can. Every progressive who has won a primary in the past decade or so has done so despite the party putting its thumb on the scale for their opponent.
Progressives need to earn their votes like everyone else.
It's weird seeing a centrist say that votes need to be earned after they lost twice by acting entitled to votes.