The blues is a steam train.
The drummer is the engine, the machinery, the beating heart. The bass player is the driver, he pulls the levers, decides what pressure is needed to climb the mountains, to cruise the flatlands. The rhythm guitarist shovels the coal, he is in tune with engine and driver, ensures there is enough power without overheating.
The passengers ride in the carriages behind, the singer, lead guitarist, saxophone player, many believe these luxuries are the leaders but they are being dragged along by the rhythm section. The section is happy with this arrangement, let the public enjoy the illusion of the dining car, the glamour, leave them in peace to work the groove.