When transplanting plants why is it so important to move a lot of soil with it instead of just the main root itself?

When transplanting plants, it's crucial to move a lot of soil with the root system because this helps preserve the delicate network of roots and beneficial microorganisms that support the plant's health. Removing just the main root can damage the plant, hindering its ability to absorb water and nutrients. Additionally, surrounding soil provides stability and minimizes transplant shock, promoting quicker adaptation to the new environment. Overall, preserving the root ball enhances the plant's chances of successful establishment in its new location.