Because that’s the platform that needs to hear it
Circlejerk preaching to the choir is fun, but doesn’t reach the people who need to hear it
You’re right, we should send Bernie to CPAC. Bet he’ll win over lots of hearts and minds.
It’s better than sending him to a room full of people who already aggrees with him. It’s kind of the point
That is the goal in a functioning democracy. That description no longer applies to the US. Our country’s voter base is made up of political illiterates, our new voters get less educated every year, and our elected officials and their oligarch counterparts are running at full tilt in an attempt to normalize and formalize flagrant disregard for our constitution.