If the American voter is a moron, as you proposed, then is the smarter party the one that treats them like a moron, yet gets elected. Or the party that says they are not, treats them like an educated adult but loses elections to someone like Trump. Multiple times. While calling those that vote for him garbage. Well, garbage fought back and kicked them out. Now Trump will kick them while they are down but blame immigrants and the deep state.
In a capitalism hellscaoe, you’re not far off. However a soup kitchens purpose is to feed people. A scammers purpose is to scam.
A political partys purpose is to get their members elected and pass legislation together. An individual politician can have similar but different purposes, but the parties purpose is clear. In this case, unlike the soup kitchen, the Dems are failing in their purpose.