I didn’t say “not true”, I said “one sided”
What is your point, exactly? Do you want the Democratic Party to win the election, or not?
If Sanders drops out/is turfed out of the Party, and goes back to being the Independent Senator from Vermont, then he will not become the President.
And neither will the Democratic nominee.
Who do you think suffers more from not holding the White House?
Sanders (a man who has inhabited the political and geographical wilderness for decades rather than compromise his principles)? Or the Democratic Party and its remaining supporters?
The Party needs him a lot more than he needs them, and whether or not you feel that is unfair or 'one-sided' is not really relevant.
Thankfully, for those foolish enough to actually
like the Democratic Party as an institution, he is not going anywhere, unless they do something unthinkably stupid even by their standards and cast him out.
But those inclined to throw temper-tantrums all over the internet because, mostly by sheer implication, Sanders reveals the Party for what it really is, would do well to better grasp the actual balance of power between the two.