Hillary is a powerful member of the party. I would not be surprised if her continued nomination is the result of favor pulling.
Hillary needs to get "put out of the way" by ceasing to be a relavant political force. Then she will stop being nominated.
The DNC needs to stop making politically motivated nominations (that focus around blatant corruption, and petty politics like race and gender) and instead start nominating candidates based on actual integrity with the party's stated goals.
However, with how flip/floppy most of them are, that would probably make them resort to names nobody has ever heard.
I'm not sure what you mean by DNC (There are two relevant organizations by that acronym:Democratic National
Convention and Democratic National
Committee). Either way, nominations don't come from the party leadership. You nominate yourself, and if you win primaries and caucuses you win the nomination.
Correct. At this point, it's essentially circular reasoning: Hillary is the frontrunner because she's the frontrunner, and nobody is stepping up to challenge her because she's the frontrunner; and since nobody else dares to take her on, she's the default candidate.
Circular reasoning implies false reasoning. The correct term would probably be self-fulfilling. And to be fair, in this chicken-or-egg scenario, she was intimidating to challengers before there were challengers to intimidate. She's not unassailable, but she's intimidating enough that none of the more influential people (who usually overlapped her base of support) were willing to challenge her, struggle for air, and risk hurting the party. Then, with the middle-party quiet, the outsiders (usually meaning more left-wing) were screwed, because they would have to duel Clinton, one-on-one, which outsiders don't have the resources and support to do (of course, one going in might trigger others, but no one decides things like that based on what might happen in the future). Put simply: she was a tough nut to crack, which gave her an air of unassailability, which made her actually unassailable.