The children are the people vehemently demanding the DNC unilaterally employ their chosen platform, under the pretense that it would instantly solve their problems, and then subsequently abstaining out of protest. The political landscape is more complicated than that.
I've said elsewhere, elections are won on popularity, not policy. If the DNC unilaterally shifts to a pro-worker platform, all their wealthy donors shift to attack ads against them. Adopting more popular policies can ironically lose them votes as those policies get misrepresented to voters by propagandists.
Add to that the habit of progressives to abstain when a platform isn't perfectly catered to them, and you have an impossible situation where you're trying to court multiple conflicting demographics while the financial support you once had has been turned against you.
You were not dealt this hand, you chose it by not telling them 'no'. it is the most powerful word you have in your arsenal learn to use it. there is a reason utilitarianism is panned basically universally in ethics classes. Had you been willing to exercise it against the DNC you might not be in the very situation you find yourself in now.
How did that work out for all the people who said no? Now Trump will help Bibi annex the West Bank. I've taken Ethics, utilitarianism was absolutely not panned.