Almost like the presidential primary isn't the only primary. The rise of the DSA is showing what primaries can do. And listen I'm not saying they're perfect and will fix everything, but their a whole hell of a lot better than the options we've had.
Also don't misunderstand you are right about Bernie and well the whole not having a presidential primary, but there's no reason you can't try to use the tools available within the system to marginally improve the circumstances of the working class AND pursue more radical action. You can do both