1) Sanders giving Hillary a semi-tough race was necessary preparation for her to do well in the GE, and
Of which has contributed generously to her perpetual poor showing among young voters as Bernie spent months hammering her on Wall St speeches and campaign contributions, 2 things that arguably wouldn't have been used much later given what we've seen.
The primary challenge didn't help her, it hurt her. Though not to say she is
entitled to a challenger-free primary. It's her own fault for waltzing through life perpetually tone-deaf to how inappropriate her actions appear to voters.