What does it mean when you say its not the harness but the horses that pull te wagon?

The phrase "it's not the harness but the horses that pull the wagon" emphasizes that the true driving force behind success or progress lies in the capabilities and efforts of the individuals (the horses), rather than the systems or structures (the harness) in place. It suggests that while frameworks and tools are important, they are ultimately ineffective without the dedication, talent, and hard work of the people involved. This highlights the value of human agency and contribution in achieving goals.